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Is Klinefelter syndrome inherited? Klinefelter syndrome is not inherited, but usually occurs as a random event during the formation of reproductive cells (eggs and sperm). An error in cell division called nondisjunction can result in reproductive cells with an abnormal number of chromosomes. For example, an egg or sper...
Fragile X syndrome is a genetic condition involving changes in part of the X chromosome. This condition causes a range of developmental problems including learning disabilities and cognitive impairment. It is the most common form of inherited intellectual disability in males and a significant cause of intellectual disa...
These resources address the diagnosis or management of Langer mesomelic dysplasia: - Genetic Testing Registry: Langer mesomelic dysplasia syndrome These resources from MedlinePlus offer information about the diagnosis and management of various health conditions: - Diagnostic Tests - Drug Therapy - Surgery and Reh...
These resources address the diagnosis or management of Bjrnstad syndrome: - Centers for Disease Control and Prevention: Hearing Loss in Children: Screening and Diagnosis - Genetic Testing Registry: Pili torti-deafness syndrome These resources from MedlinePlus offer information about the diagnosis and management of ...
People with diabetic kidney disease do not have symptoms in the early stages. As kidney disease progresses, a person can develop edema, or swelling. Edema happens when the kidneys cannot get rid of the extra fluid and salt in the body. Edema can occur in the legs, feet, or ankles and less often in the hands or face. On...
Clinical trials are research studies in which new treatments -- drugs, diagnostics, procedures, vaccines, and other therapies -- are tested in people to see if they are safe, effective, and better than the current standard of care. Clinical trials often compare a new treatment with a standard treatment to determine whi...
What are the signs and symptoms of Stomatocytosis I? The Human Phenotype Ontology provides the following list of signs and symptoms for Stomatocytosis I. 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 ...
These resources address the diagnosis or management of rheumatoid arthritis: - American College of Rheumatology: ACR-Endorsed Criteria for Rheumatic Diseases - American College of Rheumatology: Treatment for Rheumatic Diseases - Genetic Testing Registry: Rheumatoid arthritis These resources from MedlinePlus offer ...
The prevalence of renal hypouricemia is unknown; at least 150 affected individuals have been described in the scientific literature. This condition is thought to be most prevalent in Asian countries such as Japan and South Korea, although affected individuals have been found in Europe. Renal hypouricemia is likely unde...
In adults, symptoms of mineral and bone disorder in CKD may not appear until bone changes have taken place for many years. For this reason, people often refer to the disease as a silent crippler. Eventually, a person with the condition may begin to feel bone and joint pain. Mineral an...
These resources address the diagnosis or management of Rotor syndrome: - Centers for Disease Control and Prevention: Facts About Jaundice and Kernicterus - Gene Review: Gene Review: Rotor Syndrome - Genetic Testing Registry: Rotor syndrome These resources from MedlinePlus offer information about the diagnosis and ...
The prevalence of Partington syndrome is unknown. About 20 cases have been described in the medical literature.
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. Most cases result from new mutations in the gene and occur in people with no history of the disorder in their family. In other cases, an affected person inherits the m...
Within the NINDS research programs, piriformis syndrome is addressed primarily through studies associated with pain research. NINDS vigorously pursues a research program seeking new treatments for pain and nerve damage with the ultimate goal of reversing debilitating conditions such as piriformis syndrome.
Camurati-Engelmann disease is a condition that mainly affects the bones. People with this disease have increased bone density, particularly affecting the long bones of the arms and legs. In some cases, the skull and hip bones are also affected. The thickened bones can lead to pain in the arms and legs, a waddling walk,...
What are the signs and symptoms of Geniospasm? The Human Phenotype Ontology provides the following list of signs and symptoms for Geniospasm. 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 t...
Hepatic lipase deficiency is likely a rare disorder; only a few affected families have been reported in the scientific literature.
What causes Mantle cell lymphoma? Most lymphomas are not inherited, but rather an acquired disease in which the DNAwithin the cells has been damaged. Damage to the DNA occurs by a combination of different factors. Many mantle cell lymphomas are found to be associated with a chromsosome translocation. Some causes of non...
Ovarian cancer affects about 12 in 100,000 women per year.
Common symptoms of lactose intolerance include - abdominal bloating, a feeling of fullness or swelling in the abdomen - abdominal pain - diarrhea - gas - nausea Symptoms occur 30 minutes to 2 hours after consuming milk or milk products. Symptoms range from mild to severe based on t...
These resources address the diagnosis or management of cryptogenic cirrhosis: - Children's Hospital of Pittsburgh: Cirrhosis - Cleveland Clinic: Cirrhosis of the Liver - Genetic Testing Registry: Cirrhosis, cryptogenic - Genetic Testing Registry: Familial cirrhosis - MedlinePlus Encyclopedia: Cirrhosis These res...
Fetal and neonatal alloimmune thrombocytopenia (NAIT) is a condition where a fetus or newborn experiences severe thrombocytopenia (low platelet count). NAIT occurs when the mother's immune system develops antibodies against antigens on the fetal platelets, which are inherited from the father and different from those pr...
In the past, surgery was the only treatment for cystic echinococcal cysts. Chemotherapy, cyst puncture, and PAIR (percutaneous aspiration, injection of chemicals and reaspiration) have been used to replace surgery as effective treatments for cystic echinococcosis. However, surgery remains the most effective treatment t...
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.
Noonan syndrome is a genetic disorder that causes abnormal development of multiple parts of the body. Features of Noonan syndrome may include a distinctive facial appearance, short stature, a broad or webbed neck, congenital heart defects, bleeding problems, skeletal malformations, and developmental delay. Noonan syndr...
The early-onset form of Alzheimer disease is inherited in an autosomal dominant pattern, which means one copy of the altered gene in each cell is sufficient to cause the disorder. In most cases, an affected person inherits the altered gene from one affected parent. The inheritance pattern of late-onset Alzheimer disea...
What are the signs and symptoms of Nodular regenerative hyperplasia? The Human Phenotype Ontology provides the following list of signs and symptoms for Nodular regenerative hyperplasia. If the information is available, the table below includes how often the symptom is seen in people with this condition. You can use the...
Age, gender, and a weakened immune system can affect the risk of adult non-Hodgkin lymphoma. Anything that increases your risk of getting a disease is called a risk factor. Having a risk factor does not mean that you will get cancer; not having risk factors doesnt mean that you will not get cancer. Talk with your docto...
Autism spectrum disorder (ASD) is a neurological and developmental disorder that begins early in childhood and lasts throughout a person's life. It affects how a person acts and interacts with others, communicates, and learns. It includes what used to be known as Asperger syndrome and pervasive developmental disorders....
Is Lynch syndrome an inherited condition? 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 ...
Many people with medullary sponge kidney have no symptoms. The first sign that a person has medullary sponge kidney is usually a UTI or a kidney stone. UTIs and kidney stones share many of the same signs and symptoms: - burning or painful urination - pain in the back, lower abdomen, or groin - cloudy...
This condition is generally not inherited but arises from a mutation in the body's cells that occurs after conception. This alteration is called a somatic mutation.
Most cases of VACTERL association are sporadic, which means they occur in people with no history of the condition in their family. Rarely, families have multiple people affected with VACTERL association. A few affected individuals have family members with one or two features, but not enough signs to be diagnosed with t...
Creutzfeldt-Jakob disease (CJD) is a rare, degenerative brain disorder. Symptoms usually start around age 60. Memory problems, behavior changes, vision problems, and poor muscle coordination progress quickly to dementia, coma, and death. Most patients die within a year. The three main categories of CJD are - ...
In general, carpal tunnel syndrome responds well to treatment, but less than half of individuals report their hand(s) feeling completely normal following surgery. Some residual numbness or weakness is common. At work, people can perform stretching exercises, take frequent rest breaks, wear splints to keep wrists straig...
Mutations in the ASAH1 gene cause Farber lipogranulomatosis. The ASAH1 gene provides instructions for making an enzyme called acid ceramidase. This enzyme is found in cell compartments called lysosomes, which digest and recycle materials. Acid ceramidase breaks down fats called ceramides into a fat called sphingosine a...
Emanuel syndrome is a chromosomal disorder that disrupts normal development and affects many parts of the body. Infants with Emanuel syndrome have weak muscle tone (hypotonia) and fail to gain weight and grow at the expected rate (failure to thrive). Their development is significantly delayed, and most affected individ...
Inherited thyroxine-binding globulin deficiency has an X-linked pattern of inheritance. The SERPINA7 gene is located on the X chromosome, which is one of the two sex chromosomes. In males (who have only one X chromosome), a mutation in the only copy of the gene in each cell causes partial or complete inherited thyroxi...
The National Institute of Neurological Disorders and Stroke and the National Institute on Deafness and Other Communication Disorders conduct and support a broad range of scientific investigations to increase our understanding of aphasia, find better treatments, and discover improved methods to restore lost function to ...
Summary : Radiation is a type of energy. People are exposed to small amounts of radiation every day from sources such as sunlight. A radiation emergency would involve larger amounts of radiation and could be caused by - Dirty bombs - a mix of explosives with radioactive powder - Fallout from a nuclear bomb ...
Metachromatic leukodystrophy is reported to occur in 1 in 40,000 to 160,000 individuals worldwide. The condition is more common in certain genetically isolated populations: 1 in 75 in a small group of Jews who immigrated to Israel from southern Arabia (Habbanites), 1 in 2,500 in the western portion of the Navajo Nation...
You cannot control - heredity. High blood cholesterol can run in families. - age. As we get older, our cholesterol levels rise. - sex. Before menopause, women tend to have lower total cholesterol levels than men of the same age. After menopause, women's LDL (bad) cholesterol levels tend to increase. heredity. High bl...
Eosinophil peroxidase deficiency is a condition that affects certain white blood cells called eosinophils but causes no health problems in affected individuals. Eosinophils aid in the body's immune response. During a normal immune response, these cells are turned on (activated), and they travel to the area of injury or...
Lynch syndrome is an inherited condition that causes an increased risk of developing cancer. Individuals with Lynch syndrome have a higher risk of developing colon and rectal cancer, as well as cancers of the stomach, small intestine, liver, gallbladder ducts, upper urinary tract, brain, skin, and prostate. Women with ...
What causes alopecia universalis? The exact underlying cause of alopecia universalis (AU) is not currently known. AU is an advanced form of alopecia areata (AA), a condition that leads to round patches of hair loss. AA is thought to be an autoimmune condition in which an affected person's immune system mistakenly attac...
CN-AML is not usually inherited but arises from genetic changes in the body's cells that occur after conception. Rarely, an inherited mutation in the CEBPA gene causes acute myeloid leukemia. In these cases, the condition follows an autosomal dominant pattern of inheritance, which means that one copy of the altered CEB...
Distal arthrogryposis type 1 affects an estimated 1 in 10,000 people worldwide.
Methylmalonic acidemia is an inherited disorder in which the body is unable to process certain proteins and fats (lipids) properly. The effects of methylmalonic acidemia, which usually appear in early infancy, vary from mild to life-threatening. Affected infants can experience vomiting, dehydration, weak muscle tone (h...
Cronkhite-Canada syndrome is a rare gastrointestinal disorder characterized by widespread colon polyps, unhealthy looking (dystrophic) nails, hair loss (alopecia), darkening skin (such as on the hands, arms, neck and face), diarrhea, weight loss, stomach pain, and/or excess fluid accumulation in arms and legs (peripher...
Doctors have several techniques and imaging tools to help diagnose stroke quickly and accurately. The first step in diagnosis is a short neurological examination, or an evaluation of the nervous system. When a possible stroke patient arrives at a hospital, a health care professional, usually a doctor or nurse, will ask...
What treatment is available for Peters plus syndrome? Treatment varies from person to person and is based on the extent of the disease. Once a person has been diagnosed with Peters plus syndrome, the following evaluations are recommended : Eye examination Growth hormone testing Developmental assessment Heart examinatio...
Wolman disease is a type of lysosomal storage disorder. It is an inherited condition that causes a buildup of lipids (fats) in body organs and calcium deposits in the adrenal glands. Common symptoms in infants include enlarged liver and spleen, poor weight gain, low muscle tone, jaundice, vomiting, diarrhea, developmen...
These resources address the diagnosis or management of anhidrotic ectodermal dysplasia with immune deficiency: - Genetic Testing Registry: Anhidrotic ectodermal dysplasia with immune deficiency - Genetic Testing Registry: Hypohidrotic ectodermal dysplasia with immune deficiency - MedlinePlus Encyclopedia: Immunodefi...
These resources address the diagnosis or management of dilated cardiomyopathy with ataxia syndrome: - Ann & Robert H. Lurie Children's Hospital of Chicago: Cardiomyopathy - Baby's First Test - Genetic Testing Registry: 3-methylglutaconic aciduria type V - MedlinePlus Encyclopedia: Dilated Cardiomyopathy - National...
The prevalence of familial exudative vitreoretinopathy is unknown. It appears to be rare, although affected people with normal vision may never come to medical attention.
Mutations in the SBDS gene have been identified in about 90 percent of people with the characteristic features of Shwachman-Diamond syndrome. This gene provides instructions for making a protein whose function is unknown, although it is active in cells throughout the body. Researchers suspect that the SBDS protein may ...
Is treatment available for pseudoangiomatous stromal hyperplasia (PASH)? Surgical removal of the PASH lesions has been performed in some individuals. A wide margin around the mass may be removed to prevent recurrence. Although PASH lesions often grow over time and may recur, they are neither associated with malignancy ...
The exact incidence of Cohen syndrome is unknown. It has been diagnosed in fewer than 1,000 people worldwide. More cases are likely undiagnosed.
This condition has an autosomal dominant inheritance pattern, which means one copy of the altered gene in each cell is sufficient to cause the disorder. All reported cases have resulted from new mutations in the gene and have occurred in people with no history of the disorder in their family.
Floods are common in the United States. Weather such as heavy rain, thunderstorms, hurricanes, or tsunamis can cause flooding. Flooding can also happen when a river or stream overflows its bank, when a levee is breached, or when a dam breaks. Flash floods, which can develop quickly, often have a dangerous wall of roari...
Polymicrogyria is a condition characterized by abnormal development of the brain before birth. Specifically, the surface of the brain develops too many folds which are unusually small. The signs and symptoms associated with the condition vary based on how much of the brain and which areas of the brain are affected; how...
Most cases of viral gastroenteritis resolve over time without specific treatment. Antibiotics are not effective against viral infections. The primary goal of treatment is to reduce symptoms and prevent complications. Over-the-counter medicines such as loperamide (Imodium) and bismuth subsalicylate (Pep...
Leber hereditary optic neuropathy (LHON) with dystonia is a very rare variant of LHON where an individual has LHON associated with dystonia, which involves involuntary muscle contractions, tremors, and other unctrolled movements. It is caused by mutations in one of three mitochondrial genes: MT-ND1, MT-ND3, MT-ND4, and...
Childhood ovarian cancer is a rare type of cancer that occurs due to abnormal and uncontrolled cell growth in the ovaries. The childhood form, specifically, is extremely rare and accounts for less than 5% of all ovarian cancer cases. The most common types of ovarian cancers diagnosed in children and adolescents include...
Key Points - Merkel cell carcinoma is a very rare disease in which malignant (cancer) cells form in the skin. - Sun exposure and having a weak immune system can affect the risk of Merkel cell carcinoma. - Merkel cell carcinoma usually appears as a single painless lump on sun-exposed skin. -...
Noonan syndrome occurs in approximately 1 in 1,000 to 2,500 people.
Mutations in the LRP5 gene can cause juvenile primary osteoporosis. This gene provides instructions for making a protein that participates in a chemical signaling pathway that affects the way cells and tissues develop. In particular, the LRP5 protein is involved in the regulation of bone mineral density. LRP5 gene mut...
There is no standard course of treatment for ACC. Treatment usually involves management of symptoms and seizures if they occur. Associated difficulties are much more manageable with early recognition and therapy, especially therapies focusing on left/right coordination. Early diagnosis and interventions are currently t...
The exact cause of atherosclerosis isn't known. However, studies show that atherosclerosis is a slow, complex disease that may start in childhood. It develops faster as you age. Atherosclerosis may start when certain factors damage the inner layers of the arteries. These factors include: ...
Auriculo-condylar syndrome can be caused by mutations in either the GNAI3 or PLCB4 gene. These genes provide instructions for making proteins that are involved in chemical signaling within cells. They help transmit information from outside the cell to inside the cell, which instructs the cell to grow, divide, or take o...
The prevalence of congenital plasminogen deficiency has been estimated at 1.6 per one million people. This condition is believed to be underdiagnosed, because growths in one area are often not recognized as being a feature of a disorder that affects many body systems. Mild cases likely never come to medical attention.
Avascular necrosis of the femoral head (ANFH) is a degenerative condition which causes the upper ends of the thigh bones (femurs) to break down due to an inadequate blood supply and deficient bone repair. It can lead to pain and limping and cause the legs to be of unequal length. The prevalence of ANFH is unknown but a...
Parkinson's disease occurs when nerve cells, or neurons, in an area of the brain that controls movement die or become impaired. Normally, these neurons produce an important brain chemical known as dopamine, but once the neurons become impaired, they produce less dopamine and eventually die. It is this shortage of dopam...
This condition is inherited in an autosomal recessive pattern. In autosomal recessive inheritance, both copies of a gene in each cell have mutations. In Rotor syndrome, an affected individual must have mutations in both the SLCO1B1 and the SLCO1B3 gene, so both copies of the two genes are altered. The parents of an ind...
About 5,000 people in the United States are diagnosed with ALS each year. Worldwide, this disorder occurs in 2 to 5 per 100,000 individuals. Only a small percentage of cases have a known genetic cause. Among the Chamorro people of Guam and people from the Kii Peninsula of Japan, ALS-PDC can be 100 times more frequent ...
Y. enterocolitica is a relatively infrequent cause of diarrhea and abdominal pain. Based on data from the Foodborne Diseases Active Surveillance Network (FoodNet), which measures the burden and sources of specific diseases over time, approximately one culture-confirmed Y. enterocolitica infection per 100,000 persons oc...
NINDS supports a broad range of clinical and basic research on diseases causing sleep disorders in an effort to clarify the mechanisms of these conditions and to develop better treatments for them.
Trisomy 18, also called Edwards syndrome, is a chromosomal condition associated with abnormalities in many parts of the body. Individuals with trisomy 18 often have slow growth before birth (intrauterine growth retardation) and a low birth weight. Affected individuals may have heart defects and abnormalities of other o...
Mutations in the BTD gene cause biotinidase deficiency. The BTD gene provides instructions for making an enzyme called biotinidase. This enzyme recycles biotin, a B vitamin found in foods such as liver, egg yolks, and milk. Biotinidase removes biotin that is bound to proteins in food, leaving the vitamin in its free (u...
How is Usher syndrome inherited? Usher syndrome is inherited in an autosomal recessive manner. This means that a person must have a change (mutation) in both copies of the disease-causing gene in each cell to have Usher syndrome. One mutated copy is typically inherited from each parent, who are each referred to as a ca...
Lambert-Eaton myasthenic syndrome (LEMS) is a disorder of the neuromuscular junction-the site where nerve cells meet muscle cells and help activate the muscles. It is caused by a disruption of electrical impulses between these nerve and muscle cells. LEMS is an autoimmune condition; in such disorders the immune system,...
What are the signs and symptoms of Usher syndrome, type 2C? The Human Phenotype Ontology provides the following list of signs and symptoms for Usher syndrome, type 2C. 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 Medic...
What symptoms are commonly seen in tarsal tunnel syndrome? The symptoms of tarsal tunnel syndrome can vary from person to person. The most common symptom of tarsal tunnel syndrome is foot and ankle pain. Individuals may also experience a burning or tingling sensation and numbness. These symptoms may occur when a person...
These resources address the diagnosis or management of 18q deletion syndrome: - Gene Review: Gene Review: Leukodystrophy Overview - University of Texas Chromosome 18 Clinical Research Center These resources from MedlinePlus offer information about the diagnosis and management of various health conditions: - Diagno...
Signs and symptoms of childhood liver cancer include a lump or pain in the abdomen. Signs and symptoms are more common after the tumor gets big. Other conditions can cause the same signs and symptoms. Check with your childs doctor if your child has any of the following: - A lump in the abdomen that may be painf...
Bietti crystalline dystrophy is caused by mutations in the CYP4V2 gene. This gene provides instructions for making a member of the cytochrome P450 family of enzymes. These enzymes are involved in the formation and breakdown of various molecules and chemicals within cells. The CYP4V2 enzyme is involved in a multi-step p...
VLCAD deficiency is estimated to affect 1 in 40,000 to 120,000 people.
Distal arthrogryposis type 1 can be caused by mutations in at least two genes: TPM2 and MYBPC1. These genes are active (expressed) in muscle cells, where they interact with other muscle proteins to help regulate the tensing of muscle fibers (muscle contraction). It is unclear how mutations in the TPM2 and MYBPC1 genes ...
Mutations in the SOX2 gene cause SOX2 anophthalmia syndrome. This gene provides instructions for making a protein that plays a critical role in the formation of many different tissues and organs during embryonic development. The SOX2 protein regulates the activity of other genes, especially those that are important for...
Wilms tumor is a rare type of kidney cancer. It causes a tumor on one or both kidneys. It usually affects children, but can happen in adults. Having certain genetic conditions or birth defects can increase the risk of getting it. Children that are at risk should be screened for Wilms tumor every three months until they...
The prevalence of hypomyelination and congenital cataract is unknown.
The prevalence of isolated polymicrogyria is unknown. Researchers believe that it may be relatively common overall, although the individual forms of the disorder (such as bilateral generalized polymicrogyria) are probably rare.
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. In most cases, an affected person inherits the mutation from one affected parent. Other cases may result from new mutations in the gene. These cases occur in people w...
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.
The inheritance pattern of ILS depends on the gene involved. When ILS is caused by mutations in the PAFAH1B1 or TUBA1A gene, it is inherited in an autosomal dominant pattern, which means one copy of the altered gene in each cell is sufficient to cause the disorder. Most cases result from new mutations in the gene and ...
Reticulohistiocytoma (RH) is a rare benign lesion of the soft tissue. It belongs to a group of disorders called non-Langerhans cell histiocytosis and is a type of reticulohistiocytosis, all of which are types of histiocytosis. Histiocytosis is a condition in which there is rapid production (proliferation) of histiocyte...
What causes Wildervanck syndrome? The exact cause of Wildervanck syndrome is not known. It is suspected to be a polygenic condition, meaning that many genetic factors may be involved.
What are the signs and symptoms of Total Hypotrichosis, Mari type? The Human Phenotype Ontology provides the following list of signs and symptoms for Total Hypotrichosis, Mari type. If the information is available, the table below includes how often the symptom is seen in people with this condition. You can use the Med...
Mutations in the ALX4 gene account for 60 percent of cases of enlarged parietal foramina and mutations in the MSX2 gene account for 40 percent of cases. These genes provide instructions for producing proteins called transcription factors, which are required for proper development throughout the body. Transcription fact...
These resources address the diagnosis or management of MYH9-related disorder: - Gene Review: Gene Review: MYH9-Related Disorders - Genetic Testing Registry: Epstein syndrome - Genetic Testing Registry: Fechtner syndrome - Genetic Testing Registry: Macrothrombocytopenia and progressive sensorineural deafness - Gene...