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Empty sella syndrome (ESS) is a condition that involves the sella turcica, a bony structure at the base of the brain that protects the pituitary gland. There is a primary and secondary form of the condition. The primary form occurs when a structural defect above the pituitary gland increases pressure in the sella turcica and causes the gland to flatten. The secondary form occurs when the pituitary gland is damaged due to injury, a tumor, surgery or radiation therapy. Some people with ESS have no symptoms. People with secondary ESS may have symptoms of decreased pituitary function such as absence of menstruation, infertility, fatigue, and intolerance to stress and infection. In children, ESS may be associated with early onset of puberty, growth hormone deficiency, pituitary tumors, or pituitary gland dysfunction. Treatment focuses on the symptoms present in each person.
These resources address the diagnosis or management of Nager syndrome: - Genetic Testing Registry: Nager syndrome - University of California San Francisco Medical Center These resources from MedlinePlus offer information about the diagnosis and management of various health conditions: - Diagnostic Tests - Drug Therapy - Surgery and Rehabilitation - Genetic Counseling - Palliative Care
Most cases of cryptogenic cirrhosis are not inherited. However, people with a family history of liver disease or autoimmune disease are at an increased risk of developing these diseases themselves, and possibly cirrhosis. In individuals with an associated keratin gene mutation, the risk of developing cryptogenic cirrhosis appears to have an autosomal dominant pattern of inheritance. Autosomal dominant inheritance means that one copy of an altered gene in each cell is sufficient to increase the risk of developing cryptogenic cirrhosis. In these families, people inherit an increased risk of cryptogenic cirrhosis, not the disease itself.
There are many reasons why you might have bad breath. You can get it if you don't brush and floss regularly. Bacteria that build up in your mouth and between your teeth produce the bad odor. Other problems in your mouth, such as gum disease, dry mouth or cavities, may also cause it. Sinusitis or problems with your nose may be to blame. You can also have bad breath if you eat some foods, like raw onions, garlic or cabbage. And of course smoking causes its own bad aroma. Some diseases and medicines are associated with a specific breath odor. Having good dental habits, like brushing and flossing regularly, help fight bad breath. Mouthwashes, mints or chewing gum may make your breath fresher. If you have an underlying disorder, treating it may help eliminate the breath odor.
Antisynthetase syndrome is a chronic autoimmune condition that affects the muscles and various other parts of the body. The signs and symptoms can vary but may include muscle inflammation (myositis), polyarthritis (inflammation of many joints), interstitial lung disease and Raynaud phenomenon. The exact underlying cause is unknown; however, the production of autoantibodies (antibodies that attack normal cells instead of disease-causing agents) that recognize and attack certain enzymes in the body called 'aminoacyl-tRNA synthetases' appears to be linked to the cause of the syndrome. Treatment is based on the signs and symptoms present in each person but may include corticosteroids, immunosuppressive medications, and/or physical therapy.
Tarsal tunnel syndrome is a nerve disorder that is characterized by pain in the ankle, foot, and toes. This condition is caused by compression of the posterior tibial nerve, which runs through a canal near the heel into the sole of the foot. When tissues around this nerve become inflamed, they can press on the nerve and cause the pain associated with tarsal tunnel syndrome.
Ring chromosome 14 syndrome appears to be a rare condition, although its prevalence is unknown. More than 50 affected individuals have been reported in the medical literature.
This condition is inherited in an autosomal recessive pattern, which means both copies of the gene in each cell have mutations. The parents of an individual with an autosomal recessive condition each carry one copy of the mutated gene, but they typically do not show signs and symptoms of the condition.
What causes Behcet's disease? The exact cause of Behet's disease is unknown. Most symptoms of the disease are caused by inflammation of the blood vessels. Inflammation is a characteristic reaction of the body to injury or disease and is marked by four signs: swelling, redness, heat, and pain. Doctors think that an autoimmune reaction may cause the blood vessels to become inflamed, but they do not know what triggers this reaction. Under normal conditions, the immune system protects the body from diseases and infections by killing harmful "foreign" substances, such as germs, that enter the body. In an autoimmune reaction, the immune system mistakenly attacks and harms the body's own tissues. Behet's disease is not contagious; it is not spread from one person to another. Researchers think that two factors are important for a person to get Behet's disease. First, it is believed that abnormalities of the immune system make some people susceptible to the disease. Scientists think that this susceptibility may be inherited; that is, it may be due to one or more specific genes. Second, something in the environment, possibly a bacterium or virus, might trigger or activate the disease in susceptible people.
What causes antisynthetase syndrome? The exact underlying cause of antisynthetase syndrome is currently unknown. However, it is considered an autoimmune disease. Autoimmune disorders occur when the body's immune system attacks and destroys healthy body tissue by mistake. In antisynthetase syndrome, specifically, the production of autoantibodies (antibodies that attack normal cells instead of disease-causing agents) that recognize and attack certain enzymes in the body called 'aminoacyl-tRNA synthetases' appears to be linked to the cause of the syndrome. Aminoacyl-tRNA synthetases are involved in protein synthesis within the body. The exact role of autoantibodies in causation of antisynthetase syndrome is not yet known.
The NINDS supports research on movement disorders such as chorea. The goals of this research are to increase understanding of these disorders and to find ways to prevent and treat them.
How might Cowden syndrome be treated? Because Cowden syndrome is associated with an increased risk for certain types of cancer, management is typically focused on high-risk cancer screening. According to the National Comprehensive Cancer Network 2014, the recommended screening protocol for Cowden syndrome includes: Cancer Screening for Women Breast self exams beginning at age 18 Clinical breast exams every 6-12 months beginning at age 25** Annual mammogram and breast MRI beginning at age 30-35** Annual screening for endometrial cancer with ultrasound and/or random biopsy may be considered beginning at age 30-35 Prophylactic surgeries may be considered as a preventative option for some forms of cancer Cancer Screening for Men and Women Annual physical examination beginning at age 18** Annual thyroid ultrasound beginning at age 18** Baseline colonoscopy at age 35 with follow-up every 5 years (more frequent if polyps identified) Consider renal (kidney) ultrasound every 1-2 years beginning at age 40 **or individualized based on the earliest diagnosis of cancer in the family GeneReviews offers more specific information on the treatment and management of Cowden syndrome. To access this resource, please click here.
Manitoba oculotrichoanal syndrome is caused by mutations in the FREM1 gene. The FREM1 gene provides instructions for making a protein that is involved in the formation and organization of basement membranes, which are thin, sheet-like structures that separate and support cells in many tissues. The FREM1 protein is one of a group of proteins, including proteins called FRAS1 and FREM2, that interact during embryonic development as components of basement membranes. Basement membranes help anchor layers of cells lining the surfaces and cavities of the body (epithelial cells) to other embryonic tissues, including those that give rise to connective tissues such as skin and cartilage. The FREM1 gene mutations that have been identified in people with Manitoba oculotrichoanal syndrome delete genetic material from the FREM1 gene or result in a premature stop signal that leads to an abnormally short FREM1 protein. These mutations most likely result in a nonfunctional protein. Absence of functional FREM1 protein interferes with its role in embryonic basement membrane development and may also affect the location, stability, or function of the FRAS1 and FREM2 proteins. The features of Manitoba oculotrichoanal syndrome may result from the failure of neighboring embryonic tissues to fuse properly due to impairment of the basement membranes' anchoring function.
The National Institute of Neurological Disorders and Stroke (NINDS) and other institutes of the National Institutes of Health (NIH) conduct research related to PML in laboratories at the NIH, and support additional research through grants to majorresearch institutions across the country. Much of this research focuses on finding better ways to prevent, treat, and ultimately cure disorders such as PML.
Microcephaly-capillary malformation syndrome is rare. About a dozen people have been diagnosed with the disorder.
This condition is inherited in an autosomal recessive pattern, which means both copies of the gene in each cell have mutations. The parents of an individual with an autosomal recessive condition each carry one copy of the mutated gene, but they typically do not show signs and symptoms of the condition.
How might chronic progressive external ophthalmoplegia be treated? Ptosis caused by chronic progressive external ophthalmoplegia (CPEO) can be corrected by surgery, or by using glasses that have a ptosis crutch to lift the upper eyelids. Strabismus surgery can be helpful in carefully selected patients if diplopia (double vision) occurs. Some individuals with a deficiency of coenzyme Q10 have CPEO as an associated abnormality. Coenzyme Q10 is important for normal mitochondrial function. In individuals with this deficiency, supplemental coenzyme Q10 has been found to improve general neurologic function and exercise tolerance. However, coenzyme Q10 has not been shown to improve the ophthalmoplegia or ptosis in people who have isolated CPEO.
Mutations in the HADHA and HADHB genes cause mitochondrial trifunctional protein deficiency. These genes each provide instructions for making part of an enzyme complex called mitochondrial trifunctional protein. This enzyme complex functions in mitochondria, the energy-producing centers within cells. As the name suggests, mitochondrial trifunctional protein contains three enzymes that each perform a different function. This enzyme complex is required to break down (metabolize) a group of fats called long-chain fatty acids. Long-chain fatty acids are found in foods such as milk and certain oils. These fatty acids are stored in the body's fat tissues. Fatty acids are a major source of energy for the heart and muscles. During periods of fasting, fatty acids are also an important energy source for the liver and other tissues. Mutations in the HADHA or HADHB genes that cause mitochondrial trifunctional protein deficiency disrupt all three functions of this enzyme complex. Without enough of this enzyme complex, long-chain fatty acids from food and body fat cannot be metabolized and processed. As a result, these fatty acids are not converted to energy, which can lead to some features of this disorder, such as lethargy and hypoglycemia. Long-chain fatty acids or partially metabolized fatty acids may also build up and damage the liver, heart, and muscles. This abnormal buildup causes the other signs and symptoms of mitochondrial trifunctional protein deficiency.
These resources address the diagnosis or management of Unverricht-Lundborg disease: - Gene Review: Gene Review: Unverricht-Lundborg Disease - Genetic Testing Registry: Unverricht-Lundborg syndrome These resources from MedlinePlus offer information about the diagnosis and management of various health conditions: - Diagnostic Tests - Drug Therapy - Surgery and Rehabilitation - Genetic Counseling - Palliative Care
This condition is inherited in an autosomal recessive pattern, which means both copies of the gene in each cell have mutations. The parents of an individual with an autosomal recessive condition each carry one copy of the mutated gene, but they typically do not show signs and symptoms of the condition.
Summary : Computed tomography (CT) is a type of imaging. It uses special x-ray equipment to make cross-sectional pictures of your body. Doctors use CT scans to look for - Broken bones - Cancers - Blood clots - Signs of heart disease - Internal bleeding During a CT scan, you lie still on a table. The table slowly passes through the center of a large X-ray machine. The test is painless. During some tests you receive a contrast dye, which makes parts of your body show up better in the image. NIH: National Cancer Institute
These resources address the diagnosis or management of psoriatic arthritis: - American Society for Surgery of the Hand - Genetic Testing Registry: Psoriatic arthritis, susceptibility to - The Johns Hopkins Arthritis Center These resources from MedlinePlus offer information about the diagnosis and management of various health conditions: - Diagnostic Tests - Drug Therapy - Surgery and Rehabilitation - Genetic Counseling - Palliative Care
These resources address the diagnosis or management of carbamoyl phosphate synthetase I deficiency: - Baby's First Test - Gene Review: Gene Review: Urea Cycle Disorders Overview - Genetic Testing Registry: Congenital hyperammonemia, type I - MedlinePlus Encyclopedia: Hereditary Urea Cycle Abnormality These resources from MedlinePlus offer information about the diagnosis and management of various health conditions: - Diagnostic Tests - Drug Therapy - Surgery and Rehabilitation - Genetic Counseling - Palliative Care
What causes schizencephaly? The exact cause of schizencephaly is unknown. A small number of people with schizencephaly are found to have changes (mutations) in one of four genes: EMX2, SIX3, SHH, and COL4A1. Rarely, schizencephaly can affect more than one family member. This supports a genetic cause in some cases. Schizencephaly has also been linked to a variety of non-genetic factors, including young maternal age and certain medications and infections that can cause vascular disruptions (disruption of blood flow or blood supply) in a developing baby.
This condition is inherited in an autosomal dominant pattern, which means one copy of the altered gene in each cell is sufficient to cause the disorder. However, some people who inherit the altered gene never develop features of TRAPS. (This situation is known as reduced penetrance.) It is unclear why some people with a mutated gene develop the disease and other people with the mutated gene do not. In most cases, an affected person inherits the mutation from one affected parent. Other cases result from new mutations in the gene and occur in people with no history of the disorder in their family.
Certain factors affect prognosis (chance of recovery) and treatment options. The prognosis (chance of recovery) and treatment options depend on the following: - Whether the tumor is nonseminoma or seminoma. - The size of the tumor and where it is in the body. - The blood levels of AFP, -hCG, and LDH. - Whether the tumor has spread to other parts of the body. - The way the tumor responds to initial treatment. - Whether the tumor has just been diagnosed or has recurred (come back).
How is Sotos syndrome inherited? Sotos syndrome is inherited in an autosomal dominant manner. This means that having a mutation in only one of the 2 copies of the responsible gene (the NSD1 gene) is enough to cause signs and symptoms of the condition. 95% of people with Sotos syndrome do not inherit the condition from a parent. In these cases, the condition is the result of a new (de novo) mutation that occurred for the first time in the affected person. Only about 5% of people with Sotos syndrome have an affected parent and inherit the condition from that parent. If a parent of an affected person with an identified NSD1 mutation does not have any features of Sotos syndrome, that parent is very unlikely to have a mutation in the gene. This can be confirmed with genetic testing if the mutation has been identified in the child. If a person with Sotos syndrome has children, each child has a 50% (1 in 2) chance to inherit the mutation. However, the specific features and severity can vary from one generation to the next, so it is not possible to predict how a child will be affected.
Blood pressure is the force of blood pushing against blood vessel walls as the heart pumps out blood, and high blood pressure, also called hypertension, is an increase in the amount of force that blood places on blood vessels as it moves through the body. Factors that can increase this force include higher blood volume due to extra fluid in the blood and blood vessels that are narrow, stiff, or clogged. Blood pressure test results are written with two numbers separated by a slash. For example, a health care provider will write a blood pressure result as 120/80. A health care provider will say this blood pressure result as 120 over 80. The top number is called the systolic pressure and represents the pressure as the heart beats and pushes blood through the blood vessels. The bottom number is called the diastolic pressure and represents the pressure as blood vessels relax between heartbeats. Most people without chronic health conditions have a normal blood pressure if it stays below 120/80. Prehypertension is a systolic pressure of 120 to 139 or a diastolic pressure of 80 to 89. High blood pressure is a systolic pressure of 140 or above or a diastolic pressure of 90 or above.1 People should talk with their health care provider about their individual blood pressure goals and how often they should have their blood pressure checked.
These resources address the diagnosis or management of Wagner syndrome: - Gene Review: Gene Review: VCAN-Related Vitreoretinopathy - Genetic Testing Registry: Wagner syndrome These resources from MedlinePlus offer information about the diagnosis and management of various health conditions: - Diagnostic Tests - Drug Therapy - Surgery and Rehabilitation - Genetic Counseling - Palliative Care
Stool or urine samples can be examined microscopically for parasite eggs (stool for S. mansoni or S. japonicum eggs and urine for S. haematobium eggs). The eggs tend to be passed intermittently and in small amounts and may not be detected, so it may be necessary to perform a blood (serologic) test. More on: Resources for Health Professionals: Diagnosis
The causes of essential tremor are unknown. Researchers are studying several areas (loci) on particular chromosomes that may be linked to essential tremor, but no specific genetic associations have been confirmed. Several genes as well as environmental factors likely help determine an individual's risk of developing this complex condition. The specific changes in the nervous system that account for the signs and symptoms of essential tremor are unknown.
Potocki-Shaffer syndrome follows an autosomal dominant inheritance pattern, which means a deletion of genetic material from one copy of chromosome 11 is sufficient to cause the disorder. In some cases, an affected person inherits the chromosome with a deleted segment from an affected parent. More commonly, the condition results from a deletion that occurs during the formation of reproductive cells (eggs and sperm) in a parent or in early fetal development. These cases occur in people with no history of the disorder in their family.
Any child can get a UTI, though girls get UTIs more often than boys. Children with a condition called vesicoureteral reflux (VUR) are at higher risk for UTIs. VUR causes urine to reflux at the point where one or both ureters attach to the bladder. When urine stays in the urinary tract, bacteria have a chance to grow and spread. Infants and young children who get a UTI often have VUR. Boys younger than 6 months who are not circumcised are at greater risk for a UTI than circumcised boys the same age. Boys who are circumcised have had the foreskin, which is the skin that covers the tip of the penis, removed.
What are the signs and symptoms of Long QT syndrome 8? The Human Phenotype Ontology provides the following list of signs and symptoms for Long QT syndrome 8. If the information is available, the table below includes how often the symptom is seen in people with this condition. You can use the MedlinePlus Medical Dictionary to look up the definitions for these medical terms. Signs and Symptoms Approximate number of patients (when available) Prolonged QT interval - Sudden death - Syndactyly - The Human Phenotype Ontology (HPO) has collected information on how often a sign or symptom occurs in a condition. Much of this information comes from Orphanet, a European rare disease database. The frequency of a sign or symptom is usually listed as a rough estimate of the percentage of patients who have that feature. The frequency may also be listed as a fraction. The first number of the fraction is how many people had the symptom, and the second number is the total number of people who were examined in one study. For example, a frequency of 25/25 means that in a study of 25 people all patients were found to have that symptom. Because these frequencies are based on a specific study, the fractions may be different if another group of patients are examined. Sometimes, no information on frequency is available. In these cases, the sign or symptom may be rare or common.
Marfan syndrome is a disorder that affects connective tissue. Connective tissues are proteins that support skin, bones, blood vessels, and other organs. One of these proteins is fibrillin. A problem with the fibrillin gene causes Marfan syndrome. Marfan syndrome can be mild to severe, and the symptoms can vary. People with Marfan syndrome are often very tall, thin, and loose jointed. Most people with Marfan syndrome have heart and blood vessel problems, such as a weakness in the aorta or heart valves that leak. They may also have problems with their bones, eyes, skin, nervous system, and lungs. There is no single test to diagnose Marfan syndrome. Your doctor may use your medical history, family history, and a physical exam to diagnose it. Marfan syndrome has no cure, but treatments can help delay or prevent complications. Treatments include medicines, surgery, and other therapies. NIH: National Institute of Arthritis and Musculoskeletal and Skin Diseases
Mutations in the FBN1 gene cause Marfan syndrome. The FBN1 gene provides instructions for making a protein called fibrillin-1. Fibrillin-1 attaches (binds) to other fibrillin-1 proteins and other molecules to form threadlike filaments called microfibrils. Microfibrils become part of the fibers that provide strength and flexibility to connective tissue. Additionally, microfibrils store molecules called growth factors and release them at various times to control the growth and repair of tissues and organs throughout the body. A mutation in the FBN1 gene can reduce the amount of functional fibrillin-1 that is available to form microfibrils, which leads to decreased microfibril formation. As a result, excess growth factors are released and elasticity in many tissues is decreased, leading to overgrowth and instability of tissues.
Myasthenia gravis can be controlled. Some medications improve neuromuscular transmission and increase muscle strength, and some suppress the production of abnormal antibodies. These medications must be used with careful medical follow up because they may cause major side effects. Thymectomy, the surgical removal of the thymus gland (which often is abnormal in those with myasthenia gravis), improves symptoms in certain individuals Other therapies include plasmapheresis, a procedure in which abnormal antibodies are removed from the blood, and high-dose intravenous immune globulin, which temporarily modifies the immune system and provides the body with normal antibodies from donated blood.
How might blue rubber bleb nevus syndrome be treated? Treatment of blue rubber bleb nevus syndrome varies depending on the severity and location of the affected areas. Skin spots do not usually require treatment, but some individuals with this condition may want treatment for cosmetic reasons or if the location of the nevus causes discomfort or affects normal function. Bleeding in the intestines may be treated with iron supplements and blood transfusions when necessary. Surgery to remove an affected area of bowel may be recommended for repeated or severe bleeding (hemorrhage).
Treatment is symptomatic and varies, according to the type and severity of the encephalopathy. Your physician can provide specific instructions for proper care and treatment. Anticonvulsants may be prescribed to reduce or halt any seizures. Changes to diet and nutritional supplements may help some patients. In severe cases, dialysis or organ replacement surgery may be needed.
Lynch syndrome cancer risk is inherited in an autosomal dominant pattern, which means one inherited copy of the altered gene in each cell is sufficient to increase cancer risk. It is important to note that people inherit an increased risk of cancer, not the disease itself. Not all people who inherit mutations in these genes will develop cancer.
Isolated Pierre Robin sequence is usually not inherited. It typically results from new genetic changes and occurs in people with no history of the disorder in their family. When the condition is inherited, it follows an autosomal dominant pattern, which means one copy of the altered DNA in each cell is sufficient to cause the disorder.
How might Best vitelliform macular dystrophy be treated? There is no specific treatment for Best vitelliform macular dystrophy (BVMD) at this time. Low vision aids help affected people with significant loss of visual acuity. Laser photocoagulation, photodynamic therapy, and anti-VEGF (vascular endothelial growth factor) agents such as bevacizumab have shown limited success in treating some of the secondary features of BVMD such as choroidal neovascularization (when abnormal blood vessels grow under the macula and retina).
These resources address the diagnosis or management of Nakajo-Nishimura syndrome: - Genetic Testing Registry: Nakajo syndrome These resources from MedlinePlus offer information about the diagnosis and management of various health conditions: - Diagnostic Tests - Drug Therapy - Surgery and Rehabilitation - Genetic Counseling - Palliative Care
Cryptogenic organizing pneumonia (COP) is a form of idiopathic interstitial pneumonia characterized by lung inflammation and scarring that obstructs the small airways and air sacs of the lungs (alveoli). Signs and symptoms may include flu-like symptoms such as cough, fever, malaise, fatigue and weight loss. COP often affects adults in midlife (40 to 60 years of age). The exact underlying cause of the condition is unknown (idiopathic). Treatment varies based on the severity of the condition but generally includes glucocorticoids.
Too much cholesterol in your blood is called high blood cholesterol. It can be serious. People with high blood cholesterol have a greater chance of getting heart disease. High blood cholesterol does not cause symptoms, so you may not be aware that your cholesterol level is too high.
Generally, paroxysmal choreoathetosis lessens with age, and many adults have a complete remission. Because drug therapy is so effective, the prognosis for the disorder is good.
The most frequently recommended treatment for pinched nerve is rest for the affected area. Nonsteroidal anti-inflammatory drugs (NSAIDs) or corticosteroids may be recommended to help alleviate pain. Physical therapy is often useful, and splints or collars may be used to relieve symptoms. Depending on the cause and severity of the pinched nerve, surgery may be needed.
Mutations in the TREM2 gene or the TYROBP gene (also called DAP12) can cause PLOSL. The proteins produced from these two genes work together to activate certain kinds of cells. These proteins appear to be particularly important in osteoclasts, which are specialized cells that break down and remove (resorb) bone tissue that is no longer needed. These cells are involved in bone remodeling, which is a normal process that replaces old bone tissue with new bone. The TREM2 and TYROBP proteins are also critical for the normal function of microglia, which are a type of immune cell in the brain and spinal cord (central nervous system). Although these proteins play essential roles in osteoclasts and microglia, their exact function in these cells is unclear. Mutations in the TREM2 or TYROBP gene disrupt normal bone growth and lead to progressive brain abnormalities in people with PLOSL. Researchers believe that the bone changes seen with this disorder are related to malfunctioning osteoclasts, which are less able to resorb bone tissue during bone remodeling. In the central nervous system, TREM2 or TYROBP mutations cause widespread abnormalities of microglia. Researchers are working to determine how these abnormalities lead to the progressive neurological problems associated with PLOSL.
These resources address the diagnosis or management of autosomal recessive congenital methemoglobinemia: - Genetic Testing Registry: METHEMOGLOBINEMIA, TYPE I - Genetic Testing Registry: Methemoglobinemia type 2 - KidsHealth from Nemours: Blood Test: Hemoglobin - MedlinePlus Encyclopedia: Hemoglobin - MedlinePlus Encyclopedia: Methemoglobinemia These resources from MedlinePlus offer information about the diagnosis and management of various health conditions: - Diagnostic Tests - Drug Therapy - Surgery and Rehabilitation - Genetic Counseling - Palliative Care
Is Partington syndrome inherited? Partington syndrome is inherited in an X-linked recessive manner. A condition is considered X-linked if the mutated gene that causes the condition is located on the X chromosome, one of the two sex chromosomes (the Y chromosome is the other sex chromosome). Women have two X chromosomes and men have an X and a Y chromosome. In X-linked recessive conditions, men develop the condition if they inherit one gene mutation (they have only one X chromosome). Females are generally only affected if they have two gene mutations (they have two X chromosomes), although some females may rarely have a mild form of the condition if they only inherit one mutation. A woman with an X-linked recessive condition will pass the mutation on to all of her sons and daughters. This means that all of her sons will have the condition and all of her daughters will be carriers. A man with an X-linked recessive condition will pass the mutation to all of his daughters (carriers) and none of his sons.
These resources address the diagnosis or management of congenital hepatic fibrosis: - Gene Review: Gene Review: Congenital Hepatic Fibrosis Overview - Genetic Testing Registry: Congenital hepatic fibrosis These resources from MedlinePlus offer information about the diagnosis and management of various health conditions: - Diagnostic Tests - Drug Therapy - Surgery and Rehabilitation - Genetic Counseling - Palliative Care
These resources address the diagnosis or management of aceruloplasminemia: - Gene Review: Gene Review: Aceruloplasminemia - Genetic Testing Registry: Deficiency of ferroxidase These resources from MedlinePlus offer information about the diagnosis and management of various health conditions: - Diagnostic Tests - Drug Therapy - Surgery and Rehabilitation - Genetic Counseling - Palliative Care
What causes dihydrolipoamide dehydrogenase deficiency? Dihydrolipoamide dehydrogenase (DLD) deficiency is caused by changes (mutations) in the DLD gene. This gene gives the body instructions to make an enzyme called dihydrolipoamide dehydrogenase (DLD). DLD is one part of 3 different groups of enzymes that work together (enzyme complexes). These enzyme complexes are involved in breaking down amino acids commonly found in protein-rich foods, and in other reactions that help to convert energy from food into a form that our cells can use. Mutations in the DLD gene impair the function of DLD, preventing the 3 enzyme complexes from functioning properly. This causes a build-up of molecules that are normally broken down, which in turn leads to tissue damage, lactic acidosis and other chemical imbalances. The brain is especially sensitive to the buildup of molecules and lack of cellular energy, which is why there are neurological problems associated with DLD deficiency.
People who think they have had a gallbladder attack should notify their health care provider. Although these attacks usually resolve as gallstones move, complications can develop if the bile ducts remain blocked. People with any of the following symptoms during or after a gallbladder attack should see a health care provider immediately: - abdominal pain lasting more than 5 hours - nausea and vomiting - fevereven a low-grade feveror chills - yellowish color of the skin or whites of the eyes, called jaundice - tea-colored urine and light-colored stools These symptoms may be signs of serious infection or infl ammation of the gallbladder, liver, or pancreas.
Mutations in the HLCS gene cause holocarboxylase synthetase deficiency. The HLCS gene provides instructions for making an enzyme called holocarboxylase synthetase. This enzyme is important for the effective use of biotin, a B vitamin found in foods such as liver, egg yolks, and milk. Holocarboxylase synthetase attaches biotin to certain enzymes that are essential for the normal production and breakdown of proteins, fats, and carbohydrates in the body. Mutations in the HLCS gene reduce the enzyme's ability to attach biotin to these enzymes, preventing them from processing nutrients properly and disrupting many cellular functions. These defects lead to the serious medical problems associated with holocarboxylase synthetase deficiency.
Ellis-van Creveld syndrome can be caused by mutations in the EVC or EVC2 gene. Little is known about the function of these genes, although they appear to play important roles in cell-to-cell signaling during development. In particular, the proteins produced from the EVC and EVC2 genes are thought to help regulate the Sonic Hedgehog signaling pathway. This pathway plays roles in cell growth, cell specialization, and the normal shaping (patterning) of many parts of the body. The mutations that cause Ellis-van Creveld syndrome result in the production of an abnormally small, nonfunctional version of the EVC or EVC2 protein. It is unclear how the defective proteins lead to the specific signs and symptoms of this condition. Studies suggest that they prevent normal Sonic Hedgehog signaling in the developing embryo, disrupting the formation and growth of the bones, teeth, and other parts of the body. Together, mutations in the EVC and EVC2 genes account for more than half of all cases of Ellis-van Creveld syndrome. The cause of the remaining cases is unknown.
Acatalasemia is a condition characterized by very low levels of an enzyme called catalase. Many people with acatalasemia never have any health problems related to the condition and are diagnosed because they have affected family members. Some of the first reported individuals with acatalasemia developed open sores (ulcers) inside the mouth that led to the death of soft tissue (gangrene). When mouth ulcers and gangrene occur with acatalasemia, the condition is known as Takahara disease. These complications are rarely seen in more recent cases of acatalasemia, probably because of improvements in oral hygiene. Studies suggest that people with acatalasemia have an increased risk of developing type 2 diabetes mellitus, which is the most common form of diabetes. A higher percentage of people with acatalasemia have type 2 diabetes mellitus than in the general population, and the disease tends to develop at an earlier age (in a person's thirties or forties, on average). Researchers speculate that acatalasemia could also be a risk factor for other common, complex diseases; however, only a small number of cases have been studied.
IBM is generally resistant to all therapies and its rate of progression appears to be unaffected by currently available treatments.
Phosphoglycerate kinase deficiency is a genetic disorder that affects the body's ability to break down the simple sugar glucose, which is the primary energy source for most cells. Researchers have described two major forms of the condition. The most common form is sometimes called the hemolytic form. It is characterized by a condition known as chronic hemolytic anemia, in which red blood cells are broken down (undergo hemolysis) prematurely. Chronic hemolytic anemia can lead to unusually pale skin (pallor), yellowing of the eyes and skin (jaundice), fatigue, shortness of breath, and a rapid heart rate. Some people with the hemolytic form also have symptoms related to abnormal brain function, including intellectual disability, seizures, and stroke. The other form of phosphoglycerate kinase deficiency is often called the myopathic form. It primarily affects muscles, causing progressive weakness, pain, and cramping, particularly with exercise. During exercise, muscle tissue can be broken down, releasing a protein called myoglobin. This protein is processed by the kidneys and released in the urine (myoglobinuria). If untreated, myoglobinuria can lead to kidney failure. Most people with phosphoglycerate kinase deficiency have either the hemolytic form or the myopathic form. However, other combinations of signs and symptoms (such as muscle weakness with neurologic symptoms) have also been reported.
Symptoms of palpitations include feelings that your heart is: Skipping a beat Fluttering Beating too hard or too fast You may have these feelings in your chest, throat, or neck. They can occur during activity or even when you're sitting still or lying down. Palpitations often are harmless, and your heart is working normally. However, these feelings can be a sign of a more serious problem if you also: Feel dizzy or confused Are light-headed, think you may faint, or do faint Have trouble breathing Have pain, pressure, or tightness in your chest, jaw, or arms Feel short of breath Have unusual sweating Your doctor may have already told you that your palpitations are harmless. Even so, see your doctor again if your palpitations: Start to occur more often or are more noticeable or bothersome Occur with other symptoms, such as those listed above Your doctor will want to check whether your palpitations are the symptom of a heart problem, such as an arrhythmia (irregular heartbeat).
These resources address the diagnosis or management of AEC syndrome: - Gene Review: Gene Review: TP63-Related Disorders - Genetic Testing Registry: Hay-Wells syndrome of ectodermal dysplasia - Genetic Testing Registry: Rapp-Hodgkin ectodermal dysplasia syndrome These resources from MedlinePlus offer information about the diagnosis and management of various health conditions: - Diagnostic Tests - Drug Therapy - Surgery and Rehabilitation - Genetic Counseling - Palliative Care
Mutations in the RECQL4 gene cause RAPADILINO syndrome. This gene provides instructions for making one member of a protein family called RecQ helicases. Helicases are enzymes that bind to DNA and temporarily unwind the two spiral strands (double helix) of the DNA molecule. This unwinding is necessary for copying (replicating) DNA in preparation for cell division and for repairing damaged DNA. The RECQL4 protein helps stabilize genetic information in the body's cells and plays a role in replicating and repairing DNA. The most common RECQL4 gene mutation involved in RAPADILINO syndrome causes the RECQL4 protein to be pieced together incorrectly. This genetic change results in the production of a protein that is missing a region called exon 7 and is unable to act as a helicase. The loss of helicase function may prevent normal DNA replication and repair, causing widespread damage to a person's genetic information over time. These changes may result in the accumulation of DNA errors and cell death, although it is unclear exactly how RECQL4 gene mutations lead to the specific features of RAPADILINO syndrome.
Mutations in the MECP2 gene cause PPM-X syndrome. The MECP2 gene provides instructions for making a protein called MeCP2 that is critical for normal brain function. Researchers believe that this protein has several functions, including regulating other genes in the brain by switching them off when they are not needed. The MeCP2 protein likely plays a role in maintaining connections (synapses) between nerve cells. The MeCP2 protein may also control the production of different versions of certain proteins in nerve cells. Although mutations in the MECP2 gene disrupt the normal function of nerve cells, it is unclear how these mutations lead to the signs and symptoms of PPM-X syndrome. Some MECP2 gene mutations that cause PPM-X syndrome disrupt attachment (binding) of the MeCP2 protein to DNA, and other mutations alter the 3-dimensional shape of the protein. These mutations lead to the production of a MeCP2 protein that cannot properly interact with DNA or other proteins and so cannot control the expression of genes. It is unclear how MECP2 gene mutations lead to the signs and symptoms of PPM-X syndrome, but misregulation of genes in the brain likely plays a role.
How might pyruvate kinase deficiency be treated? Mild cases require no treatment. People with severe anemia may need blood transfusions. In newborns with dangerous levels of jaundice, a health care provider may recommend an exchange transfusion. Surgical removal of the spleen (splenectomy) may also be necessary to help reduce the destruction of red blood cells. However, this does not help in all cases. With small children, this is delayed as long as possible to allow the immune system to mature. Other treatment is symptomatic and supportive. Someone who had a splenectomy should receive the pneumococcal vaccine at recommended intervals. They also should receive preventive antibiotics until age 5. An article from eMedicine Journal provides additional information on treatment for pyruvate kinase deficiency at the following link. You may need to register to view the article, but registration is free. http://emedicine.medscape.com/article/125096-treatment#showall
Symptoms of brain and spinal cord tumors generally develop slowly and worsen over time unless they are treated. The tumor may be classified as benign or malignant and given a numbered score that reflects its rate of malignancy. This score can help doctors determine how to treat the tumor and predict the likely outcome, or prognosis, for the individual.
Landau-Kleffner syndrome (LKS) is a rare, childhood neurological disorder characterized by the sudden or gradual development of aphasia (the inability to understand or express language) and an abnormal electro-encephalogram (EEG). The disorder usually occurs in children between age 2 and 8. Typically, children with LKS develop normally but then lose their language skills for no apparent reason. While many of the affected individuals have seizures, some do not. The disorder is difficult to diagnose and may be misdiagnosed as autism, pervasive developmental disorder, hearing impairment, learning disability, auditory/verbal processing disorder, attention deficit disorder, intellectual disability, childhood schizophrenia, or emotional/behavioral problems. Treatment for LKS usually consists of medications, such as anticonvulsants and corticosteroids, and speech therapy, which should be started promptly. The prognosis varies. Some children may have a permanent language disorder, while others may regain much of their language abilities (although it may take months or years).
How might Niemann-Pick disease type A be treated? There is no specific treatment for this disease. Supportive care from the following specialists may be helpful for managing the symptoms: A pulmonologist for respiratory problems A cardiologist for heart problems Liver and spleen specialists Nutritionists Physical therapists A gastroenterologist Learning specialists You can learn more about ongoing research efforts to better understand the natural history of this condition and identify treatment options in the Research section of our web page.
This condition is inherited in an X-linked recessive pattern. A condition is considered X-linked if the mutated gene that causes the disorder is located on the X chromosome, one of the two sex chromosomes. In males (who have only one X chromosome), one altered copy of the gene in each cell is sufficient to cause the condition. Because females have two copies of the X chromosome, one altered copy of the gene in each cell usually leads to less severe symptoms in females than in males, or may cause no symptoms at all. A characteristic of X-linked inheritance is that fathers cannot pass X-linked traits to their sons. In X-linked recessive inheritance, a female with one altered copy of the gene in each cell is called a carrier. She can pass on the gene, but generally does not experience signs and symptoms of the disorder. Some females who carry a PLP1 mutation, however, may experience muscle stiffness and a decrease in intellectual function. Females with one PLP1 mutation have an increased risk of experiencing progressive deterioration of cognitive functions (dementia) later in life.
What causes Hirschsprung disease? There are a number of different causes of Hirschsprung disease (HSCR). For example, HSCR may occur as: A part of a syndrome In association with a chromosome anomaly (such as trisomy 21 or Down syndrome) Along with other birth defects but not as a part of a known syndrome As an isolated condition
What are the signs and symptoms of spastic diplegia cerebral palsy? The symptoms and severity of spastic diplegia cerebral palsy vary significantly from person to person. It is a form of cerebral palsy, a neurological condition that usually appears in infancy or early childhood and permanently affects muscle control and coordination. Affected people have increased muscle tone which leads to stiff or tight muscles and exaggerated reflexes (spasticity). Other signs and symptoms may include delayed motor or movement milestones (i.e. rolling over, sitting, standing); walking on toes; and a "scissored" gait (style of walking). Although symptoms may change as a person gets older, the condition does not get worse over time (progress). Cerebral palsy, including spastic diplegia cerebral palsy, can be associated with a variety of other health problems, including: Intellectual disability Learning disabilities Seizures Delayed growth Spinal abnormalities Osteoarthritis Impaired vision Hearing loss Speech and language disorders Poor bladder control Contractures
A kidney* stone is a solid piece of material that forms in a kidney when there are high levels of certain substances in the urine. These substances are normally found in the urine and do not cause problems at lower levels. A stone may stay in the kidney or travel down the urinary tract. Kidney stones vary in size. A small stone may pass on its own, causing little or no pain. A larger stone may get stuck along the urinary tract. A stone that gets stuck can block the flow of urine, causing severe pain or bleeding. *See the Pronunciation Guide for tips on how to say the words in bold.
As its name suggests, ADCY5-related dyskinesia is caused by mutations in the ADCY5 gene. This gene provides instructions for making an enzyme called adenylate cyclase 5. This enzyme helps convert a molecule called adenosine triphosphate (ATP) to another molecule called cyclic adenosine monophosphate (cAMP). ATP is a molecule that supplies energy for cells' activities, including muscle contraction, and cAMP is involved in signaling for many cellular functions. Some ADCY5 gene mutations that cause ADCY5-related dyskinesia are thought to increase adenylate cyclase 5 enzyme activity and the level of cAMP within cells. Others prevent production of adenylate cyclase 5. It is unclear how either type of mutation leads to the abnormal movements that occur in this disorder.
How is a urachal cyst diagnosed? The diagnosis of a urachal cyst may be suspected based on the presence of characteristic signs and symptoms. The following tests may then be ordered to confirm the diagnosis: Ultrasound Magnetic Resonance Imaging (MRI scan) Computed Tomography (CT scan)
This form of anemia is uncommon. However, researchers believe that it may not be as rare as they once thought. Increased awareness of the disease has led to more frequent diagnoses.
There is currently no treatment that can halt progression of any of the TSEs. Treatment is aimed at alleviating symptoms and making the patient as comfortable as possible. A clinical trial of a potential therapy for CJD is expected to begin soon at the University of California at San Francisco.
These resources address the diagnosis or management of MFDM: - Gene Review: Gene Review: Mandibulofacial Dysostosis with Microcephaly - Genetic Testing Registry: Growth and mental retardation, mandibulofacial dysostosis, microcephaly, and cleft palate These resources from MedlinePlus offer information about the diagnosis and management of various health conditions: - Diagnostic Tests - Drug Therapy - Surgery and Rehabilitation - Genetic Counseling - Palliative Care
Kidney disease -- also known as chronic kidney disease (CKD) -- occurs when kidneys can no longer remove wastes and extra water from the blood or perform other functions as they should. According to the Centers for Disease Control and Prevention, more than 20 million Americans may have kidney disease. Many more are at risk. (Watch the video to learn more about kidney disease. To enlarge the video, click the brackets in the lower right-hand corner. To reduce the video, press the Escape (Esc) button on your keyboard.)
The National Institute of Neurological Disorders and Stroke (NINDS) and other institutes at the National Institutes of Health conduct research related to pain and occipital neuralgia in their clinics and laboratories and support additional research through grants to major medical institutions across the country. Much of this research focuses on understanding the basic mechanisms of pain and testing treatments in order to find better ways to treat occipital neuralgia.
The exact number of people who have pulmonary hypertension (PH) isn't known. Group 1 pulmonary arterial hypertension (PAH) without a known cause is rare. It affects women more often than men. People who have group 1 PAH tend to be overweight. PH that occurs with another disease or condition is more common. PH usually develops between the ages of 20 and 60, but it can occur at any age. People who are at increased risk for PH include: Those who have a family history of the condition. Those who have certain diseases or conditions, such as heart and lung diseases, liver disease, HIV infection, or blood clots in the pulmonary arteries. (For more information about the diseases, conditions, and factors that cause PH, go to "Types of Pulmonary Hypertension.") Those who use street drugs (such as cocaine) or certain diet medicines. Those who live at high altitudes.
- Controlling blood glucose and blood pressure through healthy food choices is an important step toward slowing or stopping the progression of chronic kidney disease (CKD). - The kidneys remove wastes and extra water from the blood and make urine. - Millions of Americans are at risk for developing CKD because they have diabetes, high blood pressure, or both. - People with either type 1 or type 2 diabetes must choose foods carefully to control their blood glucose. Following a meal plan to keep blood glucose at a healthy level may prevent CKD from developing. - Controlling blood pressure through healthy food choices and regular physical activity can delay or prevent the development of CKD. People with CKD should try to keep their blood pressure below 140/90 mmHg. - Medical nutrition therapy (MNT) is the use of counseling by a registered dietitian to help promote a medical or health goal. - Dietitians who specialize in helping people with CKD are called renal dietitians. - Learning how to read and understand lab reports lets a person see how different foods can affect the kidneys. Patients can ask their doctor for copies of their lab reports and ask to have them explained, noting any results out of the normal range.
Focal dystonia is a movement disorder that is localized to a specific part of the body. The dystonias are a group of movement problems characterized by involuntary, sustained muscle contractions, tremors, and other uncontrolled movements. Focal task-specific dystonia, or FTSD, interferes with the performance of particular tasks, such as writing, playing a musical instrument, or participating in a sport. Additionally, FTSD has been reported in tailors, shoemakers, hair stylists, and people who frequently type or use a computer mouse. While the abnormal movements associated with focal dystonia are usually painless, they can cause high levels of anxiety. The causes of focal dystonia are unknown, although the disorder likely results from a combination of genetic and environmental factors. It is possible that the different forms of FTSD have different underlying causes. Researchers have found that at least some cases are related to malfunction of the basal ganglia, which are structures deep within the brain that help start and control movement. Most cases of focal dystonia are sporadic, which means they occur in people with no history of the condition in their family. However, at least 10 percent of affected individuals have a family history which seems to follow an autosomal dominant pattern of inheritance.
Is epidermolysis bullosa acquisita inherited? Unlike the genetic forms of epidermolysis bullosa, epidermolysis bullosa acquisita (EBA) is considered an acquired, sporadic disease. This means that it generally occurs in people with no history of the condition in their families. There have been a couple of reports of families with more than one affected person, suggesting a genetic component may be involved. This could mean that EBA may develop in a person who is "genetically susceptible." However, the condition is not thought to be due to any specific gene(s).
Keratosis follicularis spinulosa decalvans (KFSD) is a rare, inherited, skin condition. KFSD is a form of ichthyoses, a group of inherited conditions of the skin in which the skin tends to be thick and rough, and to have a scaly appearance. The face, neck, and forearms are frequently involved. The thickening of the skin is accompanied by the loss of eyebrows, eyelashes, and hair on the face and head. Allergic reactions (atopy), reduced tolerance of bright light (photophobia), and inflammation of the eye's cornea (keratitis) may also occur. KFSD is thought to be caused by mutations in the SAT1 gene and inherited in an X-linked manner.
How is Book syndrome inherited? To our knowledge, Book syndrome has only been reported in one, large Swedish family (25 cases in 4 generations) and in one other isolated case. In the Swedish family, the syndrome was inherited in an autosomal dominant manner. In autosomal dominant inheritance, having a mutation in only one copy of the responsible gene is enough to cause signs and symptoms of the condition. When a person with an autosomal dominant condition has children, each child has a 50% (1 in 2) risk to inherit the mutated copy of the gene.
Metatropic dysplasia is a rare disease; its exact prevalence is unknown. More than 80 affected individuals have been reported in the scientific literature.
Partington syndrome is a rare neurological condition that is primarily characterized by mild to moderate intellectual disability and dystonia of the hands. Other signs and symptoms may include dysarthria, behavioral abnormalities, recurrent seizures and/or an unusual gait (style of walking). Partington syndrome usually occurs in males; when it occurs in females, the signs and symptoms are often less severe. It is caused by changes (mutations) in the ARX gene and is inherited in an X-linked recessive manner. Treatment is based on the signs and symptoms present in each person.
What are the signs and symptoms of Pancreatic cancer, childhood? The Human Phenotype Ontology provides the following list of signs and symptoms for Pancreatic cancer, childhood. If the information is available, the table below includes how often the symptom is seen in people with this condition. You can use the MedlinePlus Medical Dictionary to look up the definitions for these medical terms. Signs and Symptoms Approximate number of patients (when available) Neoplasm of the pancreas - The Human Phenotype Ontology (HPO) has collected information on how often a sign or symptom occurs in a condition. Much of this information comes from Orphanet, a European rare disease database. The frequency of a sign or symptom is usually listed as a rough estimate of the percentage of patients who have that feature. The frequency may also be listed as a fraction. The first number of the fraction is how many people had the symptom, and the second number is the total number of people who were examined in one study. For example, a frequency of 25/25 means that in a study of 25 people all patients were found to have that symptom. Because these frequencies are based on a specific study, the fractions may be different if another group of patients are examined. Sometimes, no information on frequency is available. In these cases, the sign or symptom may be rare or common.
Is thanatophoric dysplasia inherited? Thanatophoric dysplasia is considered an autosomal dominant disorder because one mutated copy of the FGFR3 gene in each cell causes the condition. However, almost all cases of thanatophoric dysplasia are caused by new mutations in the FGFR3 gene and occur in people with no history of the disorder in their family. No affected individuals are known to have had children, so the disorder has not been passed to the next generation.
X-linked infantile spasm syndrome is caused by mutations in either the ARX gene or the CDKL5 gene. The proteins produced from these genes play a role in the normal functioning of the brain. The ARX protein is involved in the regulation of other genes that contribute to brain development. The CDKL5 protein is thought to regulate the activity of at least one protein that is critical for normal brain function. Researchers are working to determine how mutations in either of these genes lead to seizures and intellectual disability. Infantile spasms can have nongenetic causes, such as brain malformations, other disorders that affect brain function, or brain damage. In addition, changes in genes that are not located on the X chromosome cause infantile spasms in rare cases.
Is Castleman disease inherited? Although the exact underlying cause of Castleman disease is unknown, it is thought to occur sporadically in people with no family history of the condition.
The following steps can help a person prevent adrenal crisis: - Ask a health care provider about possibly having a shortage of adrenal hormones, if always feeling tired, weak, or losing weight. - Learn how to increase the dose of corticosteroid for adrenal insufficiency when ill. Ask a health care provider for written instructions for sick days. First discuss the decision to increase the dose with the health care provider when ill. - When very ill, especially if vomiting and not able to take pills, seek emergency medical care immediately.
The prevalence of aminoacylase 1 deficiency is unknown.
Four major types of kidney stones occur in children: - Calcium stones are the most common type of kidney stone and occur in two major forms: calcium oxalate and calcium phosphate. Calcium oxalate stones are more common. Calcium oxalate stone formation has various causes, which may include high calcium excretion, high oxalate excretion, or acidic urine. Calcium phosphate stones are caused by alkaline urine. - Uric acid stones form when the urine is persistently acidic. A diet rich in purinessubstances found in animal proteins such as meats, fish, and shellfishmay cause uric acid. If uric acid becomes concentrated in the urine, it can settle and form a stone by itself or along with calcium. - Struvite stones result from kidney infections. Eliminating infected stones from the urinary tract and staying infectionfree can prevent more struvite stones. - Cystine stones result from a genetic disorder that causes cystine to leak through the kidneys and into the urine in high concentration, forming crystals that tend to accumulate into stones.
What are the signs and symptoms of Leber congenital amaurosis 10? The Human Phenotype Ontology provides the following list of signs and symptoms for Leber congenital amaurosis 10. If the information is available, the table below includes how often the symptom is seen in people with this condition. You can use the MedlinePlus Medical Dictionary to look up the definitions for these medical terms. Signs and Symptoms Approximate number of patients (when available) Seizures 2/4 Autosomal recessive inheritance - Hyposmia - Visual impairment - The Human Phenotype Ontology (HPO) has collected information on how often a sign or symptom occurs in a condition. Much of this information comes from Orphanet, a European rare disease database. The frequency of a sign or symptom is usually listed as a rough estimate of the percentage of patients who have that feature. The frequency may also be listed as a fraction. The first number of the fraction is how many people had the symptom, and the second number is the total number of people who were examined in one study. For example, a frequency of 25/25 means that in a study of 25 people all patients were found to have that symptom. Because these frequencies are based on a specific study, the fractions may be different if another group of patients are examined. Sometimes, no information on frequency is available. In these cases, the sign or symptom may be rare or common.
X-linked severe combined immunodeficiency (SCID) is an inherited disorder of the immune system that occurs almost exclusively in males. Boys with X-linked SCID are prone to recurrent and persistent infections because they lack the necessary immune cells to fight off certain bacteria, viruses, and fungi. Many infants with X-linked SCID develop chronic diarrhea, a fungal infection called thrush, and skin rashes. Affected individuals also grow more slowly than other children. Without treatment, males with X-linked SCID usually do not live beyond infancy.
What are the signs and symptoms of Klebsiella infections? The signs and symptoms of Klebsiella infections vary since Klebsiella bacteria can cause several different types of conditions. For example, community-acquired pneumonia is one common type of Klebsiella infection which can lead to lung damage and even death in severe cases. Early signs and symptoms of this condition include: High fevers Chills Flu-like symptoms Cough with yellow and/or bloody mucus Shortness of breath Other common Klebsiella infections include bloodstream infections; wound or surgical site infections; and meningitis.
Cushing's syndrome is an endocrine disorder caused by prolonged exposure of the body's tissues to high levels of cortisol (a hormone produced by the adrenal gland). It most commonly affects adults between age 20 and 50 years. Signs and symptoms of Cushing's syndrome include upper body obesity, fatigue, muscle weakness, high blood pressure, backache, high blood sugar, easy bruising and bluish-red stretch marks on the skin. Affected women may also experience irregular menstrual periods and increased growth of body and facial hair. This condition may be caused by a variety of factors including long-term use of corticosteroid medications, tumors in the pituitary gland or adrenal adenomas.Treatment depends on the underlying cause, but may include decreasing the dosage of corticosteroids or surgery to remove tumors.
Mitochondrial trifunctional protein deficiency is a rare disorder; its incidence is unknown.
Arteriovenous malformations (AVMs) are defects in your vascular system. The vascular system includes arteries, veins, and capillaries. Arteries carry blood away from the heart to other organs; veins carry blood back to the heart. Capillaries connect the arteries and veins. An AVM is a snarled tangle of arteries and veins. They are connected to each other, with no capillaries. That interferes with the blood circulation in an organ. AVMs can happen anywhere, but they are more common in the brain or spinal cord. Most people with brain or spinal cord AVMs have few, if any, major symptoms. Sometimes they can cause seizures or headaches. AVMs are rare. The cause is not known, but they seem to develop during pregnancy or soon after birth. Doctors use imaging tests to detect them. Medicines can help with the symptoms from AVMs. The greatest danger is hemorrhage. Treatment for AVMs can include surgery or focused radiation therapy. Because surgery can be risky, you and your doctor need to make a decision carefully. NIH: National Institute of Neurological Disorders and Stroke
How is Huntington disease inherited? Huntington disease (HD) is inherited in an autosomal dominant manner. This means that having a change (mutation) in only one of the 2 copies of the HTT gene is enough to cause the condition. When a person with HD has children, each child has a 50% (1 in 2) chance to inherit the mutated gene and develop the condition. Most people with HD have an affected parent. The family history can sometimes appear negative for various reasons even though a parent carries, or carried, a mutation in the HTT gene. In rare cases, HD is caused by a new (de novo) mutation in the HTT gene, in which case the disease occurs for the first time in the affected person and is not inherited from a parent. As HD is passed through generations, the size of the mutation in the HTT gene (called a trinucleotide repeat) often increases. A longer repeat in the HTT gene may cause earlier onset of symptoms. This phenomenon is called anticipation.