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Answer the following medical question with one of the provided options:
Q:A 45-year-old homeless man is brought to the emergency department. He was found unconscious at the park. The patient has a past medical history of IV drug abuse, hepatitis C, alcohol abuse, schizophrenia, and depression. He does not receive normal medical follow up or care. His temperature is 102°F (38.9°C), blood pr...
D: Paracentesis
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Q:A 32-year-old woman comes to the physician because of a 4-day history of low-grade fever, joint pain, and muscle aches. The day before the onset of her symptoms, she was severely sunburned on her face and arms during a hike with friends. She also reports being unusually fatigued over the past 3 months. Her only medic...
D: Nuclear Sm proteins
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Q:A 24-year-old primigravida presents at 36 weeks gestation with vaginal bleeding, mild abdominal pain, and uterine contractions that appeared after bumping into a handrail. The vital signs are as follows: blood pressure 130/80 mm Hg, heart rate 79/min, respiratory rate 12/min, and temperature 36.5℃ (97.7℉). The fetal ...
C: Admit for maternal and fetal monitoring and observation
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Q:A 20-year-old man comes to the physician because of decreasing academic performance at his college for the past 6 months. He reports a persistent fear of “catching germs” from his fellow students and of contracting a deadly disease. He finds it increasingly difficult to attend classes. He avoids handshakes and close ...
B: Cognitive-behavioral therapy
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Q:A 6-month-old girl presents with recurring skin infections. Past medical history is significant for 3 episodes of acute otitis media since birth. The patient was born at 39 weeks via an uncomplicated, spontaneous transvaginal delivery, but there was delayed umbilical cord separation. She has met all developmental mil...
D: Absence of CD18 molecule on the surface of leukocytes
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Q:An investigator is studying gastric secretions in human volunteers. Measurements of gastric activity are recorded after electrical stimulation of the vagus nerve. Which of the following sets of changes is most likely to occur after vagus nerve stimulation? $$$ Somatostatin secretion %%% Gastrin secretion %%% Gastric ...
B: ↓ ↑ ↓
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Q:A 44-year-old man comes to the physician because of progressive memory loss for the past 6 months. He reports that he often misplaces his possessions and has begun writing notes to remind himself of names and important appointments. He generally feels fatigued and unmotivated, and has poor concentration at work. He h...
C: HIV-related encephalopathy
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Q:A 12-year-old male presents to the pediatrician after two days of tea-colored urine which appeared to coincide with the first day of junior high football. He explains that he refused to go back to practice because he was humiliated by the other players due to his quick and excessive fatigue after a set of drills acco...
B: Breaking down glycogen to glucose-1-phosphate
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Q:A 38-year-old woman presents with progressive muscle weakness. The patient says that symptoms onset a couple of weeks ago and have progressively worsened. She says she hasn’t been able to lift her arms to comb her hair the past few days. No significant past medical history and no current medications. Family history i...
C: High-dose corticosteroids
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Q:A 20-year-old college student comes to the physician because she has been extremely sad for the past 3 weeks and has to cry constantly. Three weeks ago, her boyfriend left her after they were together for 4 years. She has no appetite and has had a 2.3-kg (5.1-lb) weight loss. She has missed several classes because sh...
B: Adjustment disorder with depressed mood
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Q:A 10-year-old child presents to your office with a chronic cough. His mother states that he has had a cough for the past two weeks that is non-productive along with low fevers of 100.5 F as measured by an oral thermometer. The mother denies any other medical history and states that he has been around one other friend...
A: Mycoplasma pneumoniae
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Q:A 4-hour-old male newborn has perioral discoloration for the past several minutes. Oxygen by nasal cannula does not improve the cyanosis. He was delivered by cesarean delivery at 37 weeks' gestation to a 38-year-old woman, gravida 3, para 2. Apgar scores were 8 and 9 at 1 and 5 minutes, respectively. The mother has t...
B: Prostaglandin E1 administration
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Q:A 34-year-old woman, gravida 3, para 2, at 16 weeks' gestation comes to the physician because of nausea and recurrent burning epigastric discomfort for 1 month. Her symptoms are worse after heavy meals. She does not smoke or drink alcohol. Examination shows a uterus consistent in size with a 16-week gestation. Palpat...
B: Misoprostol
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Q:A 71-year-old man develops worsening chest pressure while shoveling snow in the morning. He tells his wife that he has a squeezing pain that is radiating to his jaw and left arm. His wife calls for an ambulance. On the way, he received chewable aspirin and 3 doses of sublingual nitroglycerin with little relief of pai...
C: Clopidogrel, atenolol, anticoagulation and monitoring
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Q:An obese 52-year-old man is brought to the emergency department because of increasing shortness of breath for the past 8 hours. Two months ago, he noticed a mass on the right side of his neck and was diagnosed with laryngeal cancer. He has smoked two packs of cigarettes daily for 27 years. He drinks two pints of rum ...
B: Tracheostomy
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Q:An 87-year-old woman is admitted to the intensive care unit after a neighbor found her lying on the floor at her home. Her respirations are 13/min and shallow. Despite appropriate therapy, the patient dies. Gross examination of the brain at autopsy shows neovascularization and liquefactive necrosis without cavitation...
A: 10 days
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Q:A 34-year-old female with a past medical history of a gastric sleeve operation for morbid obesity presents for pre-surgical clearance prior to a knee arthroplasty. Work-up reveals a hemoglobin of 8.7 g/dL, hematocrit of 26.1%, and MCV of 106 fL. With concern for folate deficiency, she is started on high dose folate s...
C: Peripheral neuropathy
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Q:A 50-year-old morbidly obese woman presents to a primary care clinic for the first time. She states that her father recently died due to kidney failure and wants to make sure she is healthy. She works as an accountant, is not married or sexually active, and drinks alcohol occasionally. She currently does not take any...
E: Urinalysis
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Q:A 55-year-old male was picked up by police in the public library for harassing the patrons and for public nudity. He displayed disorganized speech and believed that the books were the only way to his salvation. Identification was found on the man and his sister was called to provide more information. She described th...
A: Brief psychotic disorder
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Q:A 56-year-old man comes to the clinic complaining of sexual dysfunction. He reports normal sexual function until 4 months ago when his relationship with his wife became stressful due to a death in the family. When asked about the details of his dysfunction, he claims that he is “able to get it up, but just can’t fini...
B: Damage to the pudendal nerve
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Q:A 3-year-old girl presents with delayed growth, anemia, and jaundice. Her mother denies any history of blood clots in her past, but she says that her mother has also had to be treated for pulmonary embolism and multiple episodes of unexplained pain in the past. Her prenatal history is significant for preeclampsia, pr...
A: Hydroxyurea
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Q:A 35-year-old woman presents for evaluation of symmetric proximal muscle weakness. The patient also presents with a blue-purple discoloration of the upper eyelids accompanied by rashes on the knuckles, as shown in the picture below. What is the most likely cause?? {'A': 'Polymyositis', 'B': 'Duchenne muscular dystrop...
E: Dermatomyositis
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Q:A 26-year-old man comes to the physician because of a 1-week history of left-sided chest pain. The pain is worse when he takes deep breaths. Over the past 6 weeks, he had been training daily for an upcoming hockey tournament. He does not smoke cigarettes or drink alcohol but has used cocaine once. His temperature is ...
E: Naproxen
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Q:A prospective cohort study is conducted to evaluate the risk of pleural mesothelioma in construction workers exposed to asbestos in Los Angeles. Three hundred construction workers reporting current occupational asbestos exposure were followed alongside 300 construction workers without a history of asbestos exposure. ...
C: Latency period
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Q:A 70-year-old woman with history of coronary artery disease status-post coronary artery bypass graft presents with a stroke due to an infarction in the right middle cerebral artery territory. She is admitted to the intensive care unit for neurological monitoring following a successful thrombectomy. Overnight, the pat...
A: Argatroban
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Q:A 45-day-old male infant is brought to a pediatrician by his parents with concerns of poor feeding and excessive perspiration for one week. On physical examination, his temperature is 37.7°C (99.8°F), pulse rate is 190/min, and respiratory rate is 70/min. Mild cyanosis is present over the lips, and over the nail beds...
A: Double-inlet ventricle with unobstructed pulmonary flow
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Q:A 17-year-old white male is brought to the emergency department after being struck by a car. He complains of pain in his right leg and left wrist, and slowly recounts how he was hit by a car while being chased by a lion. In between sentences of the story, he repeatedly complains of dry mouth and severe hunger and req...
D: Marijuana
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Q:A 72-year-old woman with hypertension comes to the physician because of swelling and pain in both legs for the past year. The symptoms are worse at night and improve in the morning. Current medications include losartan and metoprolol. Her temperature is 36°C (96.8°F), pulse is 67/min, and blood pressure is 142/88 mm ...
D: Increased venous valve reflux
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Q:A 60-year-old post-menopausal female presents to her gynecologist with vaginal bleeding. Her last period was over 10 years ago. Dilation and curettage reveals endometrial carcinoma so she is scheduled to undergo a total abdominal hysterectomy and bilateral salpingo-oophorectomy. During surgery, the gynecologist visua...
D: Uterine artery
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Q:A 56-year-old woman presents with sudden-onset severe headache, nausea, vomiting, and neck pain for the past 90 minutes. She describes her headache as a ‘thunderclap’, followed quickly by severe neck pain and stiffness, nausea and vomiting. She denies any loss of consciousness, seizure, or similar symptoms in the pas...
B: Lumbar puncture
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Q:A 1-minute-old newborn is being examined by the pediatric nurse. The nurse auscultates the heart and determines that the heart rate is 89/min. The respirations are spontaneous and regular. The chest and abdomen are both pink while the tips of the fingers and toes are blue. When the newborn’s foot is slapped the face ...
C: 8
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Q:A 37-year-old man presents with back pain which began 3 days ago when he was lifting heavy boxes. The pain radiates from the right hip to the back of the thigh. The pain is exacerbated when he bends at the waist. He rates the severity of the pain as 6 out of 10. The patient has asthma and mitral insufficiency due to ...
E: Over-the-counter NSAIDs
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Q:A 27-year-old man is brought to the emergency department with minor injuries sustained in a motor vehicle accident. He says that he is fine. He also witnessed the death of a teenage girl in the accident who was his sister’s friend. He is able to return to work within a few days. A month later, he presents being withd...
E: Post-traumatic stress disorder
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Q:A 25-year-old woman, gravida 2, para 1, at 36 weeks' gestation comes to the physician because of irritability, palpitations, heat intolerance, and frequent bowel movements for the last 5 months. She has received no prenatal care. Her pulse is 118/min and blood pressure is 133/80 mm Hg. She appears anxious. There is a...
E: Microcephaly and stridor
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Q:A 53-year-old multiparous woman is scheduled to undergo elective sling surgery for treatment of stress incontinence. She has frequent loss of small amounts of urine when she coughs or laughs, despite attempts at conservative treatment. The physician inserts trocars in the obturator foramen bilaterally to make the inc...
B: Adductor longus
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Q:A 70-year-old woman is on hospital day 2 in the medical intensive care unit. She was admitted from the emergency department for a 2-day history of shortness of breath and fever. In the emergency department, her temperature is 39.4°C (103.0°F), the pulse is 120/min, the blood pressure is 94/54 mm Hg, the respiratory r...
B: D-dimer: elevated, fibrinogen level: low, platelet count: low
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Q:A newborn undergoing the standard screening tests is found to have a positive test for reducing sugars. Further testing is performed and reveals that the patient does not have galactosemia, but rather is given a diagnosis of fructosuria. What levels of enzymatic activity are altered in this patient?? {'A': 'Hexokinas...
A: Hexokinase increased; fructokinase decreased
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Q:A 53-year-old man is brought to the emergency department because of wheezing and shortness of breath that began 1 hour after he took a new medication. Earlier in the day he was diagnosed with stable angina pectoris and prescribed a drug that irreversibly inhibits cyclooxygenase-1 and 2. He has chronic rhinosinusitis ...
B: Blockage of P2Y12 component of ADP receptors
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Q:A 6-year-old boy is brought to the physician by his parents because of right lower extremity weakness, worsening headaches, abdominal pain, dark urine, and a 5-kg (11-lb) weight loss for the past 2 months. His teachers report that he has not been paying attention in class and his grades have been worsening. He has a ...
D: Subependymal giant cell astrocytoma
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Q:A 60-year-old diabetic male presents to your clinic for right ear pain. The patient reports noting worsening right ear pain for three weeks, purulent otorrhea initially which has resolved, and facial asymmetry for the past several days. He reports being poorly compliant with his diabetes medication regimen. His tempe...
B: Intravenous ciprofloxacin for 6 weeks
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Q:A 66-year-old man weighing 50 kg (110 lb) is admitted to the hospital because of sepsis complicated by acute respiratory distress syndrome. The physician decides to initiate total parenteral nutrition and prescribes short-term hypocaloric intake of 20 kcal/kg/day with 20% of the total energy requirement provided by p...
E: 500 mL of 25% dextrose solution
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Q: A 35-year-old woman who was recently ill with an upper respiratory infection presents to the emergency department with weakness in her lower limbs and difficulty breathing. Her symptoms began with a burning sensation in her toes along with numbness. She claims that the weakness has been getting worse over the last f...
C: Guillain-Barré syndrome
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Q:A 75-year-old man is brought to the emergency department after 2 days of severe diffuse abdominal pain, nausea, vomiting, and lack of bowel movements, which has led him to stop eating. He has a history of type-2 diabetes mellitus, hypertension, and chronic pulmonary obstructive disease. Upon admission, his vital sign...
C: Nasogastric decompression
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Q:A 13-year-old girl is brought to the outpatient clinic by her parents with a complaint of episodic spasm in her fingers for the past few months. Upon further questioning, her mother notes that the girl has not been doing well at school. She also believes that the girl is shorter than the other children in her class. ...
B: Autosomal dominant
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Q:A 27-year-old man presents to the emergency department for bizarre behavior. The patient had boarded up his house and had been refusing to leave for several weeks. The police were called when a foul odor emanated from his property prompting his neighbors to contact the authorities. Upon questioning, the patient state...
C: HbA1c levels
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Q:A 9-year-old boy with cystic fibrosis (CF) presents to the clinic with fever, increased sputum production, and cough. The vital signs include: temperature 38.0°C (100.4°F), blood pressure 126/74 mm Hg, heart rate 103/min, and respiratory rate 22/min. His physical examination is significant for short stature, thin bod...
A: Inhaled tobramycin for 28 days
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Q:A 66-year-old man is brought to the emergency department after a motor vehicle accident. The patient was a restrained passenger in a car that was struck on the passenger side while crossing an intersection. In the emergency department, he is alert and complaining of abdominal pain. He has a history of hyperlipidemia,...
C: Shoulder pain
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Q:A 4-year-old girl is brought to the physician because her mother is concerned that she has been talking to an imaginary friend for 2 months. The child calls her friend 'Lucy' and says “Lucy is my best friend”. The child has multiple conversation and plays with the 'Lucy' throughout the day. The girl attends preschool...
E: Reassure the mother
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Q:A 33-year-old man presents to the emergency department after an episode of syncope. He states that for the past month ever since starting a new job he has experienced an episode of syncope or near-syncope every morning while he is getting dressed. The patient states that he now gets dressed, shaves, and puts on his t...
C: Carotid hypersensitivity syndrome
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Q:A 42-year-old male presents to your office with cellulitis on his leg secondary to a dog bite. You suspect that the causative agent is a small, facultatively anaerobic, Gram-negative rod sensitive to penicillin with clavulanate. When you ask the patient how the bite occurred, the patient explains that he had a fight ...
E: Displacement
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Q:A 12-year-old boy and his siblings are referred to a geneticist for evaluation of a mild but chronic hemolytic anemia that has presented with fatigue, splenomegaly, and scleral icterus. Coombs test is negative and blood smear does not show any abnormal findings. An enzymatic panel is assayed, and pyruvate kinase is f...
B: Fructose-1,6-bisphosphate
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Q:A 63-year-old woman, gravida 0, para 0 comes to the physician because of a 3-month history of abdominal distension, constipation, and weight loss. She has a history of endometriosis. Pelvic examination shows a nontender, irregular, left adnexal mass. Her serum level of CA-125 is elevated. Serum concentrations of huma...
D: Atypical epithelial cells along with psammoma bodies
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Q:Three days after undergoing open surgery to repair a bilateral inguinal hernia, a 66-year-old man has new, intermittent upper abdominal discomfort that worsens when he walks around. He also has new shortness of breath that resolves with rest. There were no complications during surgery or during the immediate postsurg...
E: Cardiac pharmacological stress test
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Q:A 69-year-old male presents to his primary care physician for a checkup. He has not seen a doctor in 15 years and thought he may need an exam. The patient’s past medical history is unknown and he is not currently taking any medications. The patient lives on a rural farm alone and has since he was 27 years of age. The...
A: Schizoid
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Q:You are developing a new diagnostic test to identify patients with disease X. Of 100 patients tested with the gold standard test, 10% tested positive. Of those that tested positive, the experimental test was positive for 90% of those patients. The specificity of the experimental test is 20%. What is the positive pred...
C: 11%
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Q:A 70-year-old woman presents with substernal chest pain. She says that the symptoms began 2 hours ago and have not improved. She describes the pain as severe, episodic, and worse with exertion. She reports that she has had multiple similar episodes that have worsened and increased in frequency over the previous 4 mon...
D: Left ventricle
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Q:A 5-month-old boy is brought to the physician because of fever and a cough for 3 days. His mother reports that he has had multiple episodes of loose stools over the past 3 months. He has been treated for otitis media 4 times and bronchiolitis 3 times during the past 3 months. He was born at 37 weeks' gestation and th...
B: Severe combined immunodeficiency
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Q:A 57-year-old man presents the urgent care clinic with a one-week history of diffuse bone pain and generalized weakness. He was diagnosed with end-stage renal disease 6 months ago and is currently on dialysis. His wife, who is accompanying him today, adds that he is not compliant with his medicines. He has been diabe...
B: 1-α-hydroxylase
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Q:A 94-year-old woman is brought to the emergency department after she was found unresponsive and febrile at her home. Her son reports that she had an acute episode of coughing while having breakfast the day before. Six days after admission, the patient develops progressive tachypnea and a gradual decrease in oxygen sa...
A: Increased pulmonary shunt fraction
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Q:A 31-year-old man comes to the emergency department because of chest pain for the last 3 hours. He describes the pain as a sharp, substernal chest pain that radiates to the right shoulder; he says “Please help me. I'm having a heart attack.” He has been admitted to the hospital twice over the past week for evaluation...
C: Malingering
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Q:A 56-year-old man presents to the emergency department with increasing shortness of breath and mild chest discomfort. One week ago he developed cold-like symptoms, including a mild fever, headache, and occasional night sweats. He noticed that he required 2 additional pillows in order to sleep comfortably. Approximate...
A: Bumetanide
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Q:A 62-year-old man presents to his primary care provider complaining of leg pain with exertion for the past 6 months. He notices that he has bilateral calf cramping with walking. He states that it is worse in his right calf than in his left, and it goes away when he stops walking. He has also noticed that his symptoms...
D: Cilostazol
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Q:A 59-year-old man presents to the health clinic for evaluation of severe itching for the past week. The itching is worse at night while lying in bed. The patient has a past medical history of hyperlipidemia, atrial fibrillation, and colon cancer. The patient takes rivaroxaban, simvastatin, and aspirin. The patient ha...
A: Permethrin
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Q:A 26-year-old G1P0 woman is brought to the emergency room by her spouse for persistently erratic behavior. Her spouse reports that she has been sleeping > 1 hour a night, and it sometimes seems like she’s talking to herself. She has maxed out their credit cards on baby clothes. The patient’s spouse reports this has b...
E: Right ventricular atrialization
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Q:A 45-year-old woman presents to her primary care physician for knee pain. She states that she has been experiencing a discomfort and pain in her left knee that lasts for several hours but tends to improve with use. She takes ibuprofen occasionally which has been minimally helpful. She states that this pain is making ...
D: Type IV hypersensitivity
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Q:One day after undergoing total knee replacement for advanced degenerative osteoarthritis, a 66-year-old man has progressive lower abdominal pain. The surgery was performed under general anesthesia and the patient was temporarily catheterized for perioperative fluid balance. Several hours after the surgery, the patien...
A: Benign prostatic enlargement
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Q:A 25-day-old male infant presents to the emergency department because his mother states that he has been acting irritable for the past 2 days and has now developed a fever. On exam, the infant appears uncomfortable and has a temperature of 39.1 C. IV access is immediately obtained and a complete blood count and blood...
C: K capsule
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Q:A 23-year-old primigravida pregnant patient is in her 3rd trimester with twins. She complains of itching and skin lesions. The examination shows vesicular skin lesions on the abdomen but not on the face, palms, or soles. A picture of her abdomen is shown in the image. Her past medical history is insignificant. Her vi...
D: Reassure her and provide symptomatic relief with topical steroids
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Q:A 67-year-old man is brought to the physician by his daughter because he frequently misplaces his personal belongings and becomes easily confused. His daughter mentions that his symptoms have progressively worsened for the past one year. On mental status examination, he is oriented to person, place, and time. He vivi...
D: Hippocampus
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Q:A 59-year-old woman comes to the physician because of a 1-year history of pain and stiffness in her fingers and knees. The stiffness lasts for about 10 minutes after she wakes up in the morning. She also reports that her knee pain is worse in the evening. She drinks one glass of wine daily. Her only medication is ace...
E: Osteoarthritis
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Q:A 23-year-old man is brought to the emergency department from a college party because of a 1-hour history of a crawling sensation under his skin. He appears anxious and is markedly pale. His temperature is 38°C (100.4°F), pulse is 104/min, respirations are 18/min, and blood pressure is 145/90 mm Hg. Physical examinat...
C: Cocaine
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Q:A 68-year old woman presents with recurring headaches and pain while combing her hair. Her past medical history is significant for hypertension, glaucoma and chronic deep vein thrombosis in her right leg. Current medication includes rivaroxaban, latanoprost, and benazepril. Her vitals include: blood pressure 130/82 m...
C: Erythrocyte sedimentation rate
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Q:A 13-year-old boy with recently diagnosed schizophrenia presents with feelings of anxiety. The patient says that he has been having feelings of dread, especially since a friend of his has been getting bullied at school. He feels troubled by these feeling almost every day and makes it difficult for him to get ready to...
D: Ziprasidone
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Q:A 39-year-old woman, gravida 3, para 2, at 32 weeks' gestation comes to the emergency department 1 hour after the sudden onset of severe abdominal pain and nausea. She has had one episode of nonbloody vomiting. Pregnancy has been uncomplicated, except for a blood pressure measurement of 150/90 mm Hg on her last prena...
C: Abruptio placentae
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Q:A 24-year-old professional soccer player presents to the clinic with discomfort and pain while walking. He says that he has an unstable knee joint that started after an injury during a match last week. He adds that he heard a popping sound at the time of the injury. Physical examination of the knee reveals swelling o...
C: Anterior cruciate ligament
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Q:A 42-year-old woman comes to the physician with acute, severe pain in the middle of her lower back. She also complains of constipation and trouble sleeping recently. Menses occur regularly at 28-day intervals. Examination shows localized tenderness to palpation over the lumbar spine. Serum calcium is 14 mg/dL and ser...
C: Increase in interleukin-1 secretion
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Q:A 55-year-old man with a history of hypertension and benign prostate hyperplasia presents for follow-up 4 days into the treatment of a urinary tract infection with trimethoprim-sulfamethoxazole. His symptoms have resolved, and he reports no problems with urination, with the exception of a weak urine stream and hesita...
A: Reassure the patient, stop trimethoprim-sulfamethoxazole and repeat the measurement in 1–2 weeks
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Q:An 18-year-old female presents to the clinic complaining of acute abdominal pain for the past couple of hours. The pain is concentrated at the right lower quadrant (RLQ) with no clear precipitating factor and is worse with movement. Acetaminophen seems to help a little but she is concerned as the pain has occurred mo...
A: Increases the activity of cholesterol desmolase to synthesize progesterone
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Q:A 5-year-old boy is brought to the emergency department by his stepmother because of multiple injuries. She says that he sustained these injuries while playing. Radiographic findings show multiple fractures in various stages of healing. Physical examination shows the findings in the image below. What is the most like...
C: Osteogenesis imperfecta
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Q:A 5-year-old boy is brought to the physician by his mother because he does not “listen to her” anymore. The mother also reports that her son cannot concentrate on any tasks lasting longer than just a few minutes. Teachers at his preschool report that the patient is more active compared to other preschoolers, frequent...
A: Behavior therapy
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Q:At a routine exam, a 68-year-old woman is discovered to have a serum calcium level of 11.5 mg/dL. Follow-up laboratory tests show a high parathyroid hormone with low phosphorus and mildly elevated alkaline phosphatase. 24-hour urine calcium level is elevated. Review of symptoms includes complaints of fatigue, constip...
A: Subperiosteal bone resorption on hand X-ray
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Q:A 29-year-old woman, gravida 1, para 0, at 36 weeks' gestation is brought to the emergency department after an episode of dizziness and vomiting followed by loss of consciousness lasting 1 minute. She reports that her symptoms started after lying down on her back to rest, as she felt tired during yoga class. Her preg...
D: Lying in the left lateral decubitus position
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Q:A 32-year-old man presents to an outpatient clinic for tuberculosis prophylaxis before leaving for a trip to Asia, where tuberculosis is endemic. The Mantoux test is positive, but the chest X-ray and AFB sputum culture are negative. He was started on isoniazid. What is the most likely mechanism of resistance to isoni...
A: Mutations in katG
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Q:A 33-year-old man with recently diagnosed testicular cancer visits his oncologist to discuss the treatment plan. His left testicle was removed after a thorough workup of a lump. A pelvic CT showed no enlarged lymph nodes and a simple orchiectomy and pelvic lymph node dissection was completed. The final diagnosis was ...
A: DNA polymerase β
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Q:A 67-year-old woman presents to the clinic with a 9-month history of seeing bright red blood in the toilet after defecating. Additional complaints include fatigue, shortness of breath, and mild lethargy. She denies the loss of weight, abdominal pain, or changes in dietary behavior. She consumes a balanced diet and ta...
D: Hemoglobin: ↓, hematocrit: ↓, red blood cell count: ↓, mean corpuscular volume: ↓
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Q:A 20-year-old woman presents to student health for a 7-day history of sinus congestion. She has also had fever, sore throat, and infectious gastroenteritis. Upon further questioning, she has had similar problems 2 or 3 times a year for as long as she can remember. These have included sinus infections, ear infections,...
D: IgM Level: Normal, IgG Level: Normal, IgA Level: Low
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Q:A 16-year-old girl is brought to the physician because menarche has not yet occurred. She has no history of serious illness and takes no medications. She is 162 cm (5 ft 3 in) tall and weighs 80 kg (176 lb); BMI is 31.2 kg/m2. Breast and pubic hair development is Tanner stage 4. She also has oily skin, acne, and hype...
C: Elevated LH:FSH ratio
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Q:A 21-year-old man presents to the emergency department with acute back pain. The pain began a few hours prior to presentation and is located on the left lower back. The pain is described to be “shock-like,” 9/10 in pain severity, and radiates to the left groin. His temperature is 98.6°F (37°C), blood pressure is 120/...
D: Lysine
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Q:A 29-year-old woman, gravida 2, para 1, at 10 weeks' gestation comes to the physician for a prenatal visit. Over the past two weeks, she has felt nauseous in the morning and has had vulvar pruritus and dysuria that started 5 days ago. Her first child was delivered by lower segment transverse cesarean section because ...
E: Intravaginal clotrimazole
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Q:A 31-year-old man is brought in to the clinic by his sister because she is concerned about his behavior since the death of their mother 2 months ago. The patient’s sister states that he has always been a ‘loner’ and preferred being by himself than socializing with others. His social isolation resulted in him being ‘s...
A: Schizoid personality disorder
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Q:A male newborn is born at 37 weeks' gestation after spontaneous vaginal delivery. The mother had no prenatal care. Physical examination shows a urethral opening on the dorsal aspect of the penis, 4 mm proximal to the glans. There is a 3-cm defect in the midline abdominal wall superior to the pubic symphysis with expo...
C: Malpositioning of the genital tubercle
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Q:A 37-year-old obese woman presents to the neurology clinic complaining of severe pain in her left wrist and tingling sensation in her left thumb, index finger, and middle finger, and some part of her ring finger. The pain started as an occasional throb and she could ignore it or takes analgesics but now the pain is m...
A: Inability to oppose thumb to other digits
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Q:An otherwise healthy 45-year-old man comes to the physician because of a painful ulcer on his tongue for 3 days. Examination shows a shallow, tender 5-mm wide ulcer on the lateral aspect of the tongue, adjacent to his left first molar. There is no induration surrounding the ulcer or cervical lymphadenopathy. A lesion...
B: Difficulty chewing
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Q:A 60-year-old man has had intermittent pain in his right great toe for the past 2 years. Joint aspiration and crystal analysis shows thin, tapered, needle shaped intracellular crystals that are strongly negatively birefringent. Radiograph demonstrates joint space narrowing of the 1st metatarsophalangeal (MTP) joint w...
A: Monosodium urate crystal deposition
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Q:A 53-year-old man comes to the physician because of a 3-month history of a nonpruritic rash, fatigue, and decreased urination. Physical examination shows multiple erythematous, purpuric papules on his trunk and extremities that do not blanch when pressed. Serum creatinine is elevated and urinalysis shows red blood ce...
B: Anti-hepatitis C antibodies
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Q:A 75-year-old woman presents to the physician with a complaint of a frequent need to void at nighttime, which has been disrupting her sleep. She notes embarrassingly that she is often unable to reach the bathroom in time, and experiences urinary leakage throughout the night as well as during the day. The patient unde...
D: Urge incontinence
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Q:A researcher is investigating whether there is an association between the use of social media in teenagers and bipolar disorder. In order to study this potential relationship, she collects data from people who have bipolar disorder and matched controls without the disorder. She then asks how much on average these ind...
E: 6
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Q:A 35-year-old female presents to her primary care physician because of chronic fatigue that has stopped her from gardening and walking with her friends. Upon further questioning, she elaborates that she feels fine after waking up but gradually becomes more tired and weak as the day progresses. This appears to be part...
C: Hemicholinium
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Q:A 3-day-old newborn is brought to the physician because of abdominal distention, inconsolable crying, and 3 episodes of bilious vomiting since the previous evening. He was delivered at home at 40 weeks' gestation by a trained midwife. He has not passed meconium. Physical examination shows abdominal distention, a tigh...
C: Submucosa and muscularis externa
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Q:Two days after undergoing porcine aortic valve replacement surgery for aortic valve stenosis, a 62-year-old patient develops yellow discoloration of the sclera. His vital signs are within normal limits. Physical examination shows scleral icterus. Abdominal examination shows no abnormalities. Laboratory studies show: ...
A: Impaired bilirubin conjugation