USLME medecin interne

You are seeing a 41-year-old woman and her 19-year-old daughter in the emergency room because they think that they have been poisoned. The woman states that they have not been getting along with their landlord lately because they have been late on their last few rent payments. They say that the landlord is harassing them by banging on their floor at all hours of the night, turning down their heat, and asking the other tenants to spy on them. Last month, the woman thinks the landlord tried to spy on them by installing video cameras in her living room while they were out. Today, she tasted something odd in her food, and is convinced that she and her daughter have been poisoned in an attempt to get them out of the apartment once and for all. She came immediately to the hospital for treatment and to collect evidence of the poisoning. The mother is very protective of her daughter, who seems rather submissive and passive. She completely agrees with her mother's description of the events. Which of the following is the best course of action?

A 24-year-old man with chronic schizophrenia is brought to the emergency room after his parents found him in his bed and were unable to communicate with him. On examination, the man is confused and disoriented. He has severe muscle rigidity and a temperature of 39.4°C (103°F). His blood pressure is elevated, and he has a leucocytosis. Which of the following is the best first step in the pharmacologic treatment of this man?

A 30-year-old man is brought to the emergency room after he was found wandering on the streets with no shoes on in the middle of winter. He is admitted to the inpatient psychiatric unit and stabilized on antipsychotic medication. Looking at past records, his psychiatrist notes that he is repeatedly noncompliant with his medication postdischarge, and each time he relapses within 6 months. Which of the following medications is the best one for this patient to be maintained on?

A 23-year-old woman was diagnosed with schizophrenia after a single episode of psychosis (hallucinations and delusions) that lasted 7 months. She was started on a small dose of olanzapine at the time of diagnosis, which resulted in the disappearance of all her psychotic symptoms. She has now been symptom free for the past 3 years. Which of the following treatment changes should be made first?

A 28-year-old woman is diagnosed with bipolar disorder, manic type, when she was hospitalized after becoming psychotic, hypersexual, severely agitated, and unable to sleep. She is started on a medication in the acute phase of her illness. Which of the following medications, recommended for acute use in manic patients, is recommended to be continued on into maintenance therapy?

A 30-year-old man comes to the psychiatrist for the evaluation of a depressed mood. He states that at least since his mid-20s he has felt depressed. He notes poor self-esteem and low energy, and feels hopeless about his situation, though he denies suicidal ideation. He states he does not use drugs or alcohol, and has no medical problems. His last physical examination by his physician 1 month ago was entirely normal. Which of the following treatment options should be tried first?

A 22-year-old college student calls his psychiatrist because for the past week, after cramming hard for finals, his thoughts have been racing and he is irritable. The psychiatrist notes that the patient’s speech is pressured as well. The patient has been stable for the past 6 months on 500 mg of valproate twice a day. Which of the following is the most appropriate first step in the management of this patient’s symptoms?

A 38-year-old woman with bipolar disorder has been stable on lithium for the past 2 years. She comes to her psychiatrist’s office in tears after a 2-week history of a depressed mood, poor concentration, loss of appetite, and passive suicidal ideation. Which of the following is the most appropriate next step in the management of this patient?

A 42-year-old woman sees her physician because she has been depressed for the past 4 months. She also notes that she has gained 20 lb without trying to. She notes that she does not take pleasure in the activities that she once enjoyed and seems fatigued most of the time. These symptoms have caused the patient to withdraw from many of the social functions that she once enjoyed. The physician diagnoses the patient with hypothyroidism and starts her on thyroid supplementation. Six weeks later, the patient’s thyroid hormone levels have normalized, but she still reports feeling depressed. Which of the following is the most appropriate next step in the management of this patient?

A 54-year-old man sees a physician complaining of a depressed mood and inability to sleep for the past 3 weeks. He tells the physician that in the past when he has had similar episodes, he was placed on a monoamine oxidase inhibitor, which proved effective. The physician diagnoses the patient with major depression and agrees to use an MAOI. Which of the following foods must be completely avoided by this patient while on this medication?

A 10-year-old boy is brought to the psychiatrist by his mother. She states that for the past 2 months he has been increasingly irritable, withdrawn, and apathetic. He has been refusing to do his homework, and his grades have dropped. Which of the following is the best next step in management?

A 35-year-old woman is seeing a psychiatrist for treatment of her major depression. After 4 weeks on fluoxetine at 40 mg/day, her psychiatrist decides to try augmentation. Which of the following is the most appropriate medication?

While working as the medical resident on call, you are paged to see a 72-year-old woman who complains of a headache. Upon seeing you, she snaps, "You look young and foolish. I hope you're more efficient than you seem." While you are performing a basic physical examination on her, she says, "I'm going to complain to the hospital administrators about you because you have no idea how to properly deal with a patient." Which of the following is the best response to her threat?

A colleague who works as a pediatrician in your group practice comes to your office to inquire about a patient you examined earlier this morning. The colleague says that he recognized the patient as a former neighbor of his who is also a good friend of the family. The patient was recently diagnosed as HIV-positive and is now on antiretroviral medication. Your colleague asks what the patient is being treated for. What is the most appropriate response to such an inquiry?

A 35-year-old female presents to your office complaining of knee pain. She has a long history of rheumatoid arthritis affecting her hand and knee joints. The stiffness and pain has persisted over the last several months and has responded poorly to NSAIDs. Over the last two days the pain in her right knee has been interfering with her sleep. She had an episode of chills this morning. Her blood pressure is 120/70 mmHg, pulse is 90/min, temperature is 38.7°C (102°F) and respiratory rate is 18/min. Physical examination reveals swelling in the joints of her hand and wrist. The right knee is red and swollen; active and passive range of motion at the right knee is limited due to pain. This patient's current condition can be best treated with which of the following?

A 68-year-old African-American woman presents to the ER in acute distress. She complains of a sudden onset of complete visual loss in her right eye. Her vision had been blurry for the past few days and acutely worsened one hour ago. She also describes right-sided headaches of two months duration for which she has taken ibuprofen without relief. She has no nausea or vomiting. She has diabetes, hypertension, and degenerative joint disease. Her temperature is 37.2°C (98.9°F) and blood pressure is 146/86 mmHg. Examination reveals complete loss of vision in the right eye. Her pupils are 4 mm bilaterally. Fundoscopy shows a swollen pale disc with blurred margins. A bruit is heard in the right subclavicular area. Motor and sensory examination is within normal limits. Which of the following is the most appropriate next step in management?

A 45-year-old woman presents to your office complaining of one week of fatigue and weakness in her shoulders and hips. She reports difficulty performing household tasks, climbing the stairs, or rising from a chair. She denies any facial weakness or blurry vision. She has a history of gastroesophageal reflux disease and takes over the counter ranitidine. Her family history is positive for breast cancer in her mother. Her vital signs are within normal limits and examination shows normal sensation and deep tendon reflexes. Strength is 4 out of 5 in the proximal muscles groups of the arms and legs, and there is no limitation in the range of motion. Other physical examination is within normal limits. The ESR is 80 mm/hour and her serum creatine kinase is elevated. The TSH is within normal limits. Which of the following is the best initial treatment for this patient?

A 55-year-old man presents to his physician with 6 months of mild intermittent pain in both knees. The pain is aggravated by walking and weight bearing, and is partially relieved by rest. He also complains of morning stiffness that lasts for 10 minutes. He does not smoke but drinks alcohol occasionally. His BMI is 25 Kg/m2, temperature is 37°C (98.6°F), pulse is 75/min, and blood pressure is 130/80 mmHg. Examination reveals crepitus over both knee joints. Which of the following is the most appropriate initial treatment for this patient?

A 38-year-old woman complains of chronic aching pain and stiffness around the neck, shoulders, low back and hips. She fatigues easily and has been having problems with sleep. Even minor exertion worsens her pain. She has no muscle weakness, fever, malaise, weight loss or rash. She has a history of irritable bowel syndrome. Her vital signs are within normal limits. Examination shows multiple tender spots over specific points on her body. Power is 5/5 in all extremities and deep tendon reflexes are 2+. No sensory abnormalities are noted. Labs show: ESR 9 mm/hr, Hematocrit 43%, WBC count 7,000/microL, Platelet count 200,000/microL, TSH 3 microU/L, CPK 100 IU/L. Which of the following is the most appropriate pharmacotherapy for this patient?

A 35-year-old man presents to your office with severe back pain. The pain started three days ago when the patient was carrying a heavy pack. The pain radiates to the posterior surface of the right thigh. The straightleg raise test is positive. There is no bladder or bowel incontinence. Pain and temperature perception is preserved in the affected extremity, as well as in the perineal area. Anal reflex is normal. Which of the following is the best next step in the management of this patient?

A 31-year-old Caucasian male complains of joint pains. He describes right knee pain, right heel pain and lowback pain. He was recently treated for urethral discharge at an outside clinic. He has no history of trauma or illicit drug use. He is afebrile, and his vital signs are stable. His right knee is swollen, tender and warm to touch; tenderness is also present over the Achilles tendon. Oral examination shows mouth ulcers. Synovial fluid analysis from the right knee shows a white blood cell count of 10,000/mm3 with many polymorphonuclear leukocytes but a negative Gram stain. Which of the following is the most appropriate initial pharmacotherapy for this patient?

A 70-year-old male presents with malaise, pain and stiffness of his neck, shoulders and hips for the last 3 months. His stiffness is worse in the morning and lasts about 30-40 minutes. He also complains of a recent weight loss of 7 1bs and mild fevers. He has no headache, scalp tenderness, visual symptoms or jaw claudication. Examination shows no swelling or tenderness of the involved joints with normal range of motion on active and passive movement. The arteries of the scalp, neck and extremities are normally palpable without any tenderness. Labs show a hematocrit of 31% and an ESR of 65 mm/hr. Blood cultures are negative. Which of the following is the most appropriate next step in management of this patient?

A 43-year-old construction worker presents to your office 2 weeks after an episode of acute back pain. The pain started after lifting a heavy box, was localized to the lower back with little radiation to the buttocks, and quickly responded to conservative treatment. His past medical history is insignificant. He smokes 2 packs a day and consumes alcohol occasionally. He is concerned about the possibility of recurrence of the pain. Which of the following would be most helpful in preventing another episode of back pain in this patient?

A 54-year-old woman comes to the physician's office complaining of chronic, bilateral knee and hip pain. The pain increases with activity and is relieved by rest. She denies fever, chills or weight loss. The review of systems is unremarkable. She currently weighs 80 kg (180 lb) and is 146 cm (59 in) tall. Her knee joints are tender but there is no warmth, erythema or effusion. X-rays show narrow joint space, subchondral bone cysts, and bony spurs in both knees. Which of the following interventions would provide the greatest long-term benefit to this patient?

A 45-year-old man complains of sudden pain and swelling in his left first metatarsophalangeal joint. He is undergoing high dose induction chemotherapy for acute leukemia. Joint fluid aspiration reveals negative birefringent crystals and elevated white cell count. Which of the following prophylactic measures would most likely have prevented this condition?

A 30-year-old Caucasian female patient is seen at the rheumatology clinic. She has a 4-year history of rheumatoid arthritis. Over the past year, she has noticed an improvement in her symptoms. Examination of her joints reveals less swelling and erythema than on the previous visit Laboratory studies show: CBC: Hb 10.8 g/dL, Ht 32%, MCV 104 fl, Platelet count 226,000/cmm, Leukocyte count 7,500/cmm, Neutrophils 65%, Eosinophils 1%, Lymphocytes 28%, Monocytes 6%. Serum: Serum Na 140 mEq/L, Serum K 3.9 mEq/L, Chloride 100 mEq/L, Bicarbonate 18 mEq/L, BUN 16 mg/dL, Serum Creatinine 1.1 mg/dL, Calcium 9.8 mg/dL, Blood Glucose 98 mg/dL. Which of the following medications is this patient most likely taking?

A 46-year-old woman suffering from systemic lupus erythematosus (SLE) develops hematuria and proteinuria. She was diagnosed with SLE four years ago and has been treated with hydroxychloroquine. A renal biopsy is performed and shows diffuse proliferative glomerulonephritis. She is started on cyclophosphamide and prednisone and hydroxychloroquine is stopped. She continues these two medications for several weeks because of the low therapeutic response. This new therapeutic regimen puts her at an increased risk for which of the following conditions?

A 35-year-old white female presents with pain and stiffness of her wrist and hand joints for the last several months. Her morning stiffness lasts for more than an hour. She also complains of redness and joint swelling. Her past medical history is significant only for a similar episode one year ago. That episode resolved with over the counter ibuprofen. Examination of her joints shows redness, warmth, swelling and tenderness of proximal interphalangeal joints, metacarpophalangeal joints and wrists. X-ray shows periarticular osteopenia and erosions of the proximal interphalangeal and metacarpophalangeal joints. She started taking indomethacin with good relief. Which of the following is the most appropriate next step in the management of this patient?

A 40-year-old man complains of exquisite pain and tenderness in the left ankle. There is no history of trauma. The patient is taking hydrochlorothiazide for hypertension. On examination, the ankle is very swollen and tender. There are no other physical examination abnormalities. Which of the following is the best next step in management?

A 48-year-old woman complains of joint pain and morning stiffness for 4 months. Examination reveals swelling of the wrists and MCPs as well as tenderness and joint effusion in both knees. The rheumatoid factor is positive, antibodies to cyclic citrullinated protein are present, and subcutaneous nodules are noted on the extensor surfaces of the forearm. Which of the following statements is correct?

A 60-year-old man complains of pain in both knees coming on gradually over the past 2 years. The pain is relieved by rest and worsened by movement. The patient is 5ft 9 in. Tall and weighs 210 lb. There is bony enlargement of the knees with mild warmth and small effusions. Crepitation is noted on motion of the knee joint bilaterally. There are no other findings except for bony enlargement at the distal interphalangeal joint. Which of the following is the best way to prevent disease progression?

A 20-year-old woman has developed low-grade fever, a malar rash, and arthralgias of the hands over several months. High titers of anti-DNA antibodies are noted, and complement levels are low. The patient’s white blood cell count is 3000/μL, and platelet count is 90,000/μL. The patient is on no medications and has no signs of active infection. Which of the following statements is correct?

A 75-year-old man complains of headache. On one occasion he transiently lost vision in his right eye. He also complains of aching in the shoulders and neck. There are no focal neurologic findings. Carotid pulses are normal without bruits. Laboratory data show a mild anemia. Erythrocyte sedimentation rate (ESR) is 85. Which of the following is the best approach to management?

A 55-year-old man with psoriasis has been troubled by long-standing destructive arthritis involving the hands, wrists, shoulders, knees, and ankles. Hand films demonstrate pencil-in-cup deformities. He has been treated with naproxen 500 mg bid, sulfasalazine 1 g bid, prednisone 5 mg qd, and methotrexate 17.5 mg once a week without substantive improvement. Which of the following treatments is most likely to provide long-term benefit?

A 35-year-old woman complains of aching all over. She says she sleeps poorly and all her muscles and joints hurt. Her symptoms have progressed over several years. She reports she is desperate because pain and weakness often cause her to drop things. Physical examination shows multiple points of tenderness over the neck, shoulders, elbows, and wrists. There is no joint swelling or deformity. A complete blood count and erythrocyte sedimentation rate are normal. Rheumatoid factor is negative. Which of the following is the best therapeutic option in this patient?

A 32-year-old Caucasian female comes to the physician because of a one-week history of fatigue, progressive worsening of shortness of breath and swelling of feet. She denies any chest pain. She has no other medical problems except a recent cold two weeks ago. She is not taking any medication. Her temperature is 36.7°C (98°F), blood pressure is 110/65 mmHg, pulse is 90/min, and respirations are 20/min. Bilateral basal crackles, elevated jugular venous pressure, and 2+ bilateral pitting edema of the ankles are noted. Complete blood count is unremarkable. Transthoracic echocardiogram of her heat will most likely show?

A 35-year-old Caucasian male is being evaluated for poor exercise tolerance and muscle weakness. He has no past medical history. His blood pressure ranges from 175-185 mmHg systolic and 105-115 mmHg diastolic on repeat measurement. His heat rate is 78-95/min His serum chemistry is significant for blood glucose of 95 mg/dL serum creatinine of 0.7mg/dL serum Na of 146 mEq/L and serum K of 2.4 mEq/L. CT scan of the abdomen reveals a 3 cm mass in the left adrenal gland. Which of the following additional findings would you expect in this patient? ( Plasma renin activity, Serum aldosterone, Serum bicarbonate

A 20-year-old female presents to your office for a routine. She has no complaints and her past medical history is insignificant. She is not taking any medications and denies drug abuse. Her blood pressure is 125/65 mmHg and heat rate is 80/min. Cardiac auscultation reveals early diastolic murmur at the left sternal border. What is the next best step in the management of this patient?

A 68-year-old man is brought to the emergency room after he passed out for one minute during an early morning jog. He was not confused after the episode and did not have bowel or bladder incontinence. He has been having exertional chest pain and shortness of breath for the past few months. He has never had any resting chest pain. He has been healthy except for hypertension, for which he takes hydrochlorothiazide. He has a 20 pack year smoking history and occasionally drinks a glass of wine. His blood pressure is 142/90 mm Hg, pulse is 80/min, and respirations are 16/min. Carotid pulse is delayed S2 is weak and an S4 is present. A grade 3/6 systolic ejection murmur is in the right 2nd intercostal space, radiating to the carotids. Neurological examination reveals no focal findings, and there are no signs of head trauma. An EKG shows left ventricular hypertrophy. The first set of cardiac enzymes is negative. Which of the following is the most appropriate next step in management?

A 61-year-old woman with a history of diabetes and hypertension is brought to the ED by her daughter. The patient states that she started feeling short of breath approximately 12 hours ago and then noticed a tingling sensation in the middle of her chest and became diaphoretic. An ECG reveals ST depression in leads II, III, and aVF. You believe that the patient had a non–ST-elevation MI (NSTEMI). Which of the following cardiac markers begins to rise within 3 to 6 hours of chest pain onset, peaks at 12 to 24 hours, and returns to baseline in 7 to 10 days?

A 71-year-old man is playing cards with some friends when he starts to feel a pain in the left side of his chest. His fingers in the left hand become numb and he feels short of breath. His wife calls the ambulance and he is brought to the hospital. In the ED, an ECG is performed. Which of the following best describes the order of ECG changes seen in an MI?

While playing a match of tennis, a 56-year-old man with a medical history significant only for acid reflux disease starts to feel substernal chest pain that radiates into his left arm and shortness of breath. His pain feels better after drinking antacid, but since it is not completely resolved, his partner calls 911. Upon arrival, EMS administers aspirin and sublingual nitroglycerin. After 20 minutes, the man’s symptoms resolve. He is brought to the ED for further evaluation where his ECG shows sinus rhythm without any ischemic abnormalities. You order a chest radiograph and send his blood work to the laboratory for analysis. Which of the following statements regarding the diagnosis of acute MI is most accurate?

During a routine office visit, a 62-year-old male is found to have a pulsatile non-tender mass above his umbilicus. His medical history is significant for hypertension, chronic renal insufficiency, myocardial infarction, and peripheral vascular disease. He quit smoking 10 years ago. On physical examination, his blood pressure is 160/90 mmHg and pulse is 76/min. Laboratory analyses reveal a serum creatinine of 2.0 mg/dl. Which of the following is the most appropriate next step in evaluating this patient's abdominal mass?

An 18-year-old male complains of fever and transient pain in both knees and elbows. The right knee was red and swollen for 1 day during the week prior to presentation. On physical examination, the patient has a low-grade fever. He has a III/VI, high pitched, apical systolic murmur with radiation to the axilla, as well as a soft, mid-diastolic murmur heard at the base. A tender nodule is palpated over an extensor tendon of the hand. There are pink erythematous lesions over the abdomen, some with central clearing. The following laboratory values are obtained: Hct: 42, WBC: 12,000/μL with 80% polymorphonuclear leukocytes, 20% lymphocytes, ESR: 60 mm/h. The patient’s ECG is shown below. Which of the following tests is most critical to diagnosis?

A 35-year-old male complains of substernal chest pain aggravated by inspiration and relieved by sitting up. Lung fields are clear to auscultation, and heart sounds are somewhat distant. Chest x-ray shows an enlarged cardiac silhouette. Which of the following is the best next step in evaluation?

A 32-year-old male presents to your office with concern about progressive fatigue and lower extremity edema. He has experienced decreased exercise tolerance over the past few months, and occasionally awakens coughing at night. Past medical history is significant for sickle cell anemia and diabetes mellitus. He has had multiple admissions to the hospital secondary to vasoocclusive crises since the age of three. Physical examination reveals a displaced PMI, but is otherwise unremarkable. ECG shows a first degree AV block and low voltage. Chest x-ray shows an enlarged cardiac silhouette with clear lung fields. Which of the following would be the best initial diagnostic approach?

A 64-year-old diabetic with a long history of uncontrolled hypertension is admitted for chest pain. ECG reveals elevated ST segments in the anterior wall leads. Cardiac enzymes are elevated and the patient is admitted to the ICU for supportive care. He receives low molecular weight heparin and is placed on a nitroglycerin drip. He continues to have chest pain and requires intravenous morphine. Three days later, the patient is transferred to the floor and he remains on bed rest. During the night the nurse on call informs you that the patient has a cold leg. On examination, the left leg is cold and there are no distal pulses. There is minimal swelling and the leg appears mottled. Emergency vascular surgery consult was placed and the appropriate treatment was given. Which of the following should also be considered in this patient?

A 36-year-old man presents to your office for a routine pre-employment physical. He has no complaints except for occasional morning headaches. His father died suddenly at the age of 54. The patient's blood pressure is 175/103 mmHg in the right arm and 180/105 mmHg in the left arm. His heart rate is 82/min. His lungs are clear bilaterally and his heart sounds are normal. Bilateral, non-tender, upper abdominal masses are palpated on exam. His hemoglobin level is 15.2 g/dL and creatinine concentration is 0.8 mg/dL. Which of the following is most likely to diagnose this patient's condition?

15) A 56-year-old male is hospitalized following an acute anterior wall myocardial infarction that was treated with thrombolytic therapy 4 days ago. On day 4 of his hospitalization, he develops recurrent chest pain, similar in quality and severity to his previous pain. Sublingual nitroglycerin is administered but does not help. His blood pressure is now 140/90 mmHg and his heart rate is 82/min. S1 and S2 are normal, and there are no cardiac murmurs or rubs. Lungs are clear to auscultation. Which of the following laboratory tests would be most useful to send in this setting?

A 60-year-old Caucasian man presents to the office with a 2-week history of worsening shortness of breath and decreased exercise tolerance. His breathlessness is worse at night. He thinks his legs are swelling up. He has hypertension, coronary artery disease and chronic obstructive pulmonary disease. He used to drink heavily and smoke 1 pack of cigarettes daily but has quit recently, although he still reports occasionally drinking a "few beers." He currently denies any chest pain, palpitations or cough. His temperature is 37.5°C (99.5°F), blood pressure is 110/70 mm Hg, pulse is 96/min and respirations are 22/min. The pertinent physical findings are an S3, bibasilar crackles, JVP 10 cm above the sternal angle, mild hepatomegaly, and 4+ pitting lower extremity edema. The patient is immediately treated with oxygen, intravenous furosemide, and nitrates. Which of the following markers is most likely elevated in this patient?

A 68-year-old Caucasian male presents to the emergency room with a three-week history of progressive dyspnea, orthopnea, and lower extremity edema. His past medical history is significant for hypertension, type 2 diabetes mellitus, myocardial infarction experienced eight years ago, and congestive heart failure. His current medications include metoprolol, digoxin, enalapril, furosemide, spironolactone, and aspirin. His blood pressure is 145/90 mmHg, and heart rate is 75/min. Symmetric 2+ pitting edema of the lower extremities is present. Point of maximal impulse is displaced to the left and soft holosystolic murmur is heard on the apex. Bilateral crackles are present over the lower lobes. His laboratory values are: Hemoglobin 11.0 g/dl, Leukocyte count 7 ,500/cmm, Platelets 300,000/cmm, Serum sodium 128 mEq/L, Serum potassium 5.3 mEq/L, Serum calcium 9.0 mg/dl, Serum phosphorus 4.0 mg/dl, Serum creatinine 1.9 mg/dl. ECG does not reveal acute ischemic changes. Which of the following is most likely correct concerning this patient's condition?

A 70-year-old male is brought to the ER, by his wife, because he lost consciousness while getting up in the morning. The syncopal episode lasted for several minutes, and the patient rapidly recovered consciousness. He had diarrhea and a decreased appetite one day earlier, which resolved spontaneously. His past medical history is significant for hypertension that is effectively controlled with the combination of hydrochlorothiazide/amiloride. His blood pressure is 120/70 mmHg, while supine, and 98/50 mmHg, while standing. The physical examination revealed a mucosal dryness. The EKG is normal. Which of the following laboratory values is the most sensitive indicator of the patient's underlying condition?

A 74-year-old woman presents to your office complaining of diarrhea and decreased appetite over the past week as well as increasing fatigue and occasional palpitations over the last few days. Her past medical history is significant for chronic atrial fibrillation for which she takes metoprolol, digoxin and warfarin. She smokes cigarettes and has for the past several years. On physical examination, her blood pressure is 140/90 mmHg and her heart rate is 70/min and irregular. Lung auscultation reveals scattered wheezes. Her abdomen is soft and non-tender. The liver span is 8 cm and the spleen is not palpable. There is no ankle edema. Her last measured INR was 2.3 two weeks ago. Which of the following is the best initial test in this patient?

A 43-year-old male complains of frequent epigastric burning not relieved by antacids. The sensation is typically brought on by heavy lifting at work and takes 10-15 minutes to go away. He denies having associated arm or neck pain, cough, shortness of breath or difficulty swallowing. His past medical history is significant for systemic lupus erythematosus (SLE) diagnosed five years ago, for which he takes low-dose prednisone daily. On physical examination, his blood pressure is 140/90 mmHg and pulse is 80/min and regular. Heart, lung, and abdomen exams are unremarkable. EKG is normal. Which of the following is the best next step in managing this patient?

An 84-year-old Caucasian male is brought to the ER with severe chest pain, dyspnea and diaphoresis. His past medical history is significant for a long history of hypertension and diabetes mellitus, type 2. He experienced a severe myocardial infarction 6 months ago. His current medications are enalapril, metoprolol, aspirin, furosemide, potassium, glyburide and pravastatin, but he says that he has not been taking some of his medications recently. Physical examination reveals acrocyanosis and symmetric 3+ lower extremity edema. Point of maximal apical impulse is displaced to the left, and a holosystolic II/VI apical murmur is heard at the apex. Non-specific ST segment and T wave changes are present on ECG. The initial set of cardiac enzymes are positive. The patient continues to deteriorate, despite aggressive diuretic and vasodilator therapy. You perform an echocardiographic evaluation of left ventricular function and decide to proceed with pulmonary artery catheterization. Cardiac index (CI), total peripheral resistance (TPR) and left ventricular enddiastolic volume (LVEDV) are determined. Which of the following is most likely to present in this patient?

36-year-old male patient, who has a history of Marfan's syndrome, presents with sudden onset of severe central tearing chest pain radiating to his back. The pain is 9/10 in severity and is unrelated to exertion. He denies any history of alcohol or tobacco use. Measurement of his BP shows a difference of 35 mmHg between his two arms. Chest auscultation reveals clear lung sounds and a mid-systolic click. What is the most appropriate next diagnostic step in the management of this patient?

A 45-year-old white male presents to the ER after an episode of syncope. His medical history is unremarkable except for an upper respiratory infection one week ago. On physical examination, his temperature is 37.2°C (99°F), pulse is 90/min, blood pressure is 100/60 mmHg and respirations are 13/min. His neck veins are distended and his heart sounds are distant. His lungs are clear to auscultation bilaterally. Chest x-ray reveals small bilateral pleural effusions and an enlarged cardiac silhouette. Which of the following EKG findings is fairly specific for his condition?

A 70-year-old patient presents to the ER with a 3-hour history of intensive retrosternal chest pain that radiates to the interscapular area. He states that he has never experienced this pain before. His past medical history is significant for a 20-year history of hypertension and a 10-year history of diabetes mellitus, type 2. His current medications include enalapril and hydrochlorothiazide. He does not smoke or consume alcohol. His vital signs are BP 180/110 mmHg in the right arm and 178/110 mmHg in the left arm, PR 85/min and RR 18/min. The physical examination revealed an early decrescendo-type diastolic murmur at the left sternal border. The EKG is normal. Which of the following is the best next step in the management of this patient?

A 15-year-old male presents to your office on the advice of his football coach. The patient started playing football this year and suffered a syncopal episode at practice yesterday. He reports that he was sprinting with the rest of the team and became lightheaded. He lost consciousness and fell to the ground, regaining consciousness within one or two minutes. He suffered no trauma during the event. He has no prior history of head injury or recent illness. He has had no prior episodes of syncope. The patient is adopted and family history unavailable. Physical examination is unremarkable. What is the best course of action regarding this patient’s syncopal episode?

A 42-year-old man develops shortness of breath (SOB) and chest pain 7 days after an open cholecystectomy. His blood pressure is 145/86 mmHg, pulse is 120/min, respirations 24/min, and oxygen saturation of 97%. Pulmonary embolism is clinically suspected. Which of the following is the most common ECG finding of pulmonary embolism?

A 32-year-old woman presents to the ED with a persistent fever of 101°F over the last 3 days. The patient states that she used to work as a convenience store clerk but was fired 2 weeks ago. Since then, she has been using drugs intravenously daily. Cardiac examination reveals a heart murmur. Her abdomen is soft and nontender with an enlarged spleen. Chest radiograph reveals multiple patchy infiltrates in both lung fields. Laboratory results reveal white blood cells (WBC) 14,000/μL with 91% neutrophils, hematocrit 33%, and platelets 250/μL. An ECG reveals sinus rhythm with first-degree heart block. Which of the following is the most appropriate next step in management?

An elderly man presents to the emergency department with chest pain. He has a history of stable angina and recent onset diabetes mellitus, but now the chest pain comes on with less exertion and takes longer to go away. An ECG and cardiac enzymes are ordered. If this man has unstable angina, what are the expected findings on ECG and cardiac enzyme testing?

A 64-year-old white man with type 2 diabetes mellitus presents to the emergency department after “passing out.” While climbing the stairs, he felt dyspneic and lost consciousness as he reached the top. Before the event he experienced no palpitations or change in vision. When he awoke he felt alert and called for help immediately. He reports dyspnea on exertion for the past year. He has no history of chest pain, seizures, or recent illnesses. Medications include calcium and vitamin D supplements, glyburide, and synthroid. He is allergic to penicillin. Family history is noncontributory. He drinks wine socially and does not smoke or use illicit substances. His blood pressure is 136/92 mmHg, heart rate is 88/min, respiratory rate is 14/min, and temperature is 36.5°C (97.7°F). Physical examination reveals a systolic crescendodecrescendo murmur best heard in the second right intercostal space with a soft S2. ECG shows nonspecific ST-segment changes and left ventricular hypertrophy with a normal heart rate and rhythm. Which of the following interventions will most likely reveal the cause of this syncopal event?

A 70-year-old man comes to his primary care physician for his annual check-up. He has a history of hypertension, hyperlipidemia, and coronary artery disease, and had coronary artery bypass grafting 6 years ago. On examination the physician notes a right carotid bruit. Which of the following is the most appropriate next step?

A 62-year-old man with coronary artery disease (CAD) presents with presyncope. His physical examination is normal except for bradycardia (pulse 56 beats/min) and an irregular pulse. The electrocardiogram (ECG) shows Wenckebach’s type atrioventricular (AV) block. Which of the following are you most likely to see on the ECG?

A 36-year-old woman presents to the ED with sudden onset of left-sided chest pain and mild shortness of breath that began the night before. She was able to fall asleep without difficulty but woke up in the morning with persistent pain that is worsened upon taking a deep breath. She walked up the stairs at home and became very short of breath, which made her come to the ED. Two weeks ago, she took a 7-hour flight from Europe and since then has left-sided calf pain and swelling. What is the most common ECG finding for this patient’s presentation?

Yesterday you admitted a 55-year-old white male to the hospital for an episode of chest pain, and you are seeking to rule out MI plus assess for any underlying coronary artery disease. The patient tends to be anxious about his health. On admission, his lungs were clear, but his heart revealed a grade 1/6 early systolic murmur at the upper left sternal border without radiation. Blood pressure readings have consistently been in the 140/90 mmHg to 150/100 mmHg range. Cardiac enzymes are normal. A resting ECG shows only left ventricular hypertrophy with secondary ST-T changes (“LVH with strain”). Why would a treadmill ECG stress test not be an appropriate test in this patient?

A 67-year-old male presents to your office after community ultrasound screening revealed an aortic aneurysm measuring 3.0 x 3.5 cm. Physical examination confirms a palpable, pulsatile, nontender abdominal mass just above the umbilicus. The patient’s medical conditions include hypertension, hyperlipidemia, and tobacco use. What is the best recommendation for the patient to consider?

A 67-year-old male presents to your clinic to establish primary care; he is asymptomatic. He has a history of hypertension for which he takes hydrochlorothiazide. His father had a myocardial infarction at age 62. The patient smoked until 5 years ago, but has been abstinent from tobacco since then. His blood pressure in the office today is 132/78 mmHg. Aside from being overweight, the remainder of the physical examination is unremarkable. Which of the following preventive health interventions would be most appropriately offered to him today?

You are called by a surgical colleague to evaluate a 54-year-old woman with ECG abnormalities one day after a subtotal thyroidectomy for a toxic multinodular goiter. Her only medication is fentanyl for postoperative pain control. The patient denies any history of syncope, and has no family history of sudden cardiac death. Physical examination is unremarkable except for a clean postoperative incision at the base of the neck. Her ECG is reproduced below. What is the best next step in evaluation and management of this patient?

An 81-year-old man is hospitalized for acute onset of shortness of breath and lower extremity edema. Although he lives by himself, it is very difficult for him to move around his apartment without experiencing fatigue. He has not seen his physician in years but was told in the past that he had high blood pressure. On physical examination his jugular venous pulse is palpated 9 cm above his sternal notch, inspiratory crackles are heard at his lung bases, and there is 3+ lower extremity edema. Which of the following will confirm the most likely diagnosis?

A 58-year-old man with no prior cardiac history presents with retrosternal chest pain starting at rest and lasting 30 minutes. The pain radiates to the left arm and is associated with diaphoresis and dyspnea. His blood pressure is 150/90 mmHg, pulse 100/min, the heart sounds are normal, and the lungs are clear to auscultation. Which of the following is the next most appropriate investigation?

A 58-year-old man is undergoing cardiac catheterization for evaluation of chest pain symptoms. He is worried about the risks, and as part of obtaining informed consent, you advise him about the risks and benefits of the procedure. Which of the following aspects of angiography is true?

A 50-year-old man comes in for his annual check-up. There is a swelling on his left eyelid, which he casually acknowledges by saying that it has appeared "on-and-off for the past 2 years." It initially starts as a painful lesion which regresses with hot compresses, but then eventually reappears. On examination of his left eye, you note a nodular, painless, rubbery lesion on the eyelid without any discharge, redness or other abnormalities. What is the best next step in the management of his eye lesion?

A 60-year-old male farmer presents to the office for the evaluation of a slightly painful ulcer on the top of his lower lip. The ulcer has not healed since he first noticed it three months ago. He has always been healthy and denies any sexual activity during the past year. He is afebrile. Physical examination shows a 3x7 mm, partially encrusted ulcer in the vermilion zone near the moist line (mucocutaneous junction) of the lower lip, surrounded by a 6 x 12 mm area of induration. There are no palpable submental or submandibular lymph nodes. The remainder of the physical examination is unremarkable. Complete blood count and differential are normal. Biopsy of the ulcer will most likely to show:

A 30-year-old black female has a 2-month history of non-productive cough and a painful skin eruption in the lower extremities. She denies fever or weight loss. Physical examination shows several non-tenders raised plaques around the nares and scattered similar plaques around the base of the neck. In the lower extremities she has several erythematous tender non-ulcerated nodules, measuring up to 4 cm in diameter. Chest x-ray reveals bilateral hilar adenopathy and a streaky interstitial density in the right upper lobe. What is the best way to establish a histological diagnosis?

A 72-year-old woman presents with pruritus for the past 6 weeks. She is careful to moisturize her skin after her daily shower and uses soap sparingly. She has never had this symptom before. The itching is diffuse and keeps her awake at night. Over this time she has lost 15 lb of weight and has noticed diminished appetite. She has previously been healthy and takes no medications. Physical examination shows no evidence of rash; a few excoriations are present. She appears fatigued and shows mild temporal muscle wasting. The general examination is otherwise unremarkable. What is the best next step in her management?

A 39-year-old male with a prior history of myocardial infarction complains of yellow bumps on his elbows and buttocks. Yellow-colored cutaneous plaques are noted in those areas. The lesions occur in crops and have a surrounding reddish halo. Which of the following is the best next step in evaluation of this patient?

A 20-year-old white man notes an uneven tan on his upper back and chest. On examination, he has many circular, lighter macules with a barely visible scale that coalesce into larger areas. Which test is most likely to establish the diagnosis?

A 25-year-old postal worker presents with a pruritic, nonpainful skin lesion on the dorsum of his hand. It began like an insect bite but expanded over several days. On examination, the lesion has a black, necrotic center associated with severe local swelling. The patient does not appear to be systemically ill, and vital signs are normal. Which of the following is correct?

A 25-year-old who has been living in Washington, DC, presents with a diffuse vesicular rash over his face and trunk. He also has fever. He has no history of chickenpox and has not received the varicella vaccine. Which of the following information obtained from history and physical examination suggests that the patient has chickenpox and not smallpox?

A 68-year-old man complains of several blisters arising over the back and trunk for the preceding 2 weeks. He takes no medications and has not noted systemic symptoms such as fever, sore throat, weight loss, or fatigue. The general physical examination is normal. The oral mucosa and the lips are normal. Several 2 to 3 cm bullae are present over the trunk and back. A few excoriations where the blisters have ruptured are present. The remainder of the skin is normal, without erythema or scale. What is the best diagnostic approach at this time?

A 49-year-old African-American male comes to the office and complains of headaches which have been worsening for the last three months. His other complaints include diffuse joint pains, pain on the lateral half of his right hand, difficulty getting his wedding ring out due to finger swelling, and difficulty holding and gripping objects with his right hand. His past medical history is significant for hypertension, which has not been controlled well despite compliance with medications, very low salt diet, and regular exercise. His current medications are amlodipine, lisinopril, and hydrochlorothiazide. His blood pressure is 146/98 mmHg, pulse is 90/min, temperature is 36.7°C (98°F) and respirations are 14/min. His facial features appear coarse when compared to his driver's license photo, which was taken three years ago. His palms are sweaty and have a doughy feel. His skin is oily. There are multiple skin tags, particularly around his neck area. Hand examination reveals positive Tinel's and Phalen's sign. Which of the following will be the most helpful in confirming the clinical diagnosis?

A 54-year-old male comes to the office for follow-up care of his foot ulcer. He has no complaints regarding the ulcer, but he has recently become polyuric and polydipsic. Fasting blood work reveals elevated glucose levels. He is prescribed oral hypoglycemics, and counseled on self-monitoring at home. On his next follow-up visit, the patient proudly states that he has been "very compliant" with his medications, and that his glucose levels are "always well-controlled." Which of the following is the best way to determine whether this patient is telling the truth?

A 48-year-old white male complains of generalized bone pain after undergoing bowel surgery for inflammatory bowel disease. His pain is more severe at the lower spine, pelvis, and lower extremities. Examination shows tenderness over the lower spine, pelvis, and lower extremities. Proximal muscle weakness is noted. X-rays of the lumbar spine show decreased bone density with blurring of the spine. X-rays of the femoral neck show pseudofractures, bilaterally. Which of the following lab abnormalities is consistent with this patient's diagnosis?

A 24-year-old white female is brought to the emergency department (ED) by her mother due to altered mental status. According to her mother, she suffered from viral gastroenteritis 4 days ago. Since then, she has been on oral fluids. Over the past 2 days, her condition had been deteriorating, but she kept refusing admission to the hospital. Her past history is not significant, except for excessive thirst, water intake and weight loss over the past two months. Her blood pressure is 100/56 mmHg, pulse is 120/min (regular and weak), temperature is 37.2°C (99°F), and respirations are 28/min (rapid and deep). Pulse oximetry is 94% on room air. She is arousable and moves all her extremities. Her mucous membranes are very dry. Her neck is supple. The chest is clear on auscultation. Which of the following is the most appropriate next step in management?

A 21-year-old female has a several month history of easy fatigability and palpitations. She also complains of excessive sweating. She follows a strict, low calorie diet in order to lose weight. Her blood pressure is 120/70 mmHg and her heart rate is 100/min. Her BMI is 19kg/m2 Thyroid function testing reveals the following findings: TSH decreased, Total T4 high, Total T3 high. Radioiodine uptake is diffusely decreased over the thyroid gland. Which of the following is the most likely pathologic finding on biopsy of this woman's thyroid gland?

A 45-year-old white male patient presents for the evaluation of high blood pressure. He also complains of polyuria, polydipsia and fatigue. His past medical and family histories are unremarkable. He does not use tobacco, alcohol or drugs. His blood pressure is 180/100mmHg. Physical examination shows no abnormalities. Laboratory studies show low serum potassium and high plasma aldosterone levels. CT scan of the abdomen shows a small, right adrenal mass. Which of the following additional findings is most likely to be present in this patient?

A 28-year-old white female presents to the office for the evaluation of goiter. She denies any recent change in appetite or weight, diarrhea, constipation, heat or cold intolerance, dyspnea and hoarseness. Her menses are normal and regular. Examination shows a symmetrically enlarged, non-tender, firm and rubbery thyroid gland. There is no lymphadenopathy. The rest of the physical examination is normal. Laboratory studies reveal an elevated serum TSH level with normal T4 and T3 levels. Serological testing for Hashimoto's thyroiditis is ordered. Which of the following are the most prevalent antibodies in patients with Hashimoto's thyroiditis?

An elderly woman is brought to the emergency department (ED) by her husband in a semiconscious state. According to her husband, she had complained of feeling unwell "over the past day or so”, but he only became very concerned when he returned from work today and found her very drowsy and difficult to arouse. Her past medical history is significant for diabetes with diabetic nephropathy and hypothyroidism. Her medications include thyroxine, metformin, gliclazide and lisinopril. Her temperature is 37.3°C (99°F), blood pressure is 110/65 mmHg, and pulse is 90/min. GCS = 13/15 (Motor 6, Verbal4, Eye3). She is confused and not oriented to time or place, but is able to follow commands. Physical examination reveals dry mucous membranes and decreased skin turgor. Neurological examination reveals weakness in the left arm. The rest of the examination is unremarkable. Urinalysis shows: Blood negative, Glucose +++, Ketones negative, Protein +, Leukocyte esterase negative, Nitrites negative, WBC 10-20/HPF. Which of the following is the most appropriate next investigation to perform?

A 45-year-old female comes to the office for the evaluation of excessive hair growth over her face and body. Her hirsutism rapidly developed over a period of 3 months. She underwent bilateral tubal ligation 4 years ago. Her menstrual cycles were regular in the past, but for the last 3 months, she has not had a menstrual period. She denies any hot flashes or vaginal discomfort. On physical examination, her height is 5'2" (169 cm) and weight is 140 lbs (63.5kg). A large amount of coarse terminal hair is noted on her face, chest and lower abdomen. She appears masculine and has an enlarged clitoris. There is significant temporal balding. Which of the following is the most appropriate next step in management?

A 27-year-old Caucasian male is diagnosed with medullary thyroid carcinoma that is non-resectable. His past medical history is insignificant. He does not smoke or consume alcohol. His family history is significant for thyroid cancer and pheochromocytoma in his father. Which of the following tests could have been most effective in preventing this patient's non-resectable cancer?

A 35-year-old Caucasian male presents with weakness, fatigue, and weight loss over the past year. He is anorexic and has lost interest in all his activities. His temperature is 37.1°C (99°F), pulse is 84/min, blood pressure is 101/72 mmHg, and respirations are 14/min. On physical examination, he does not appear to be in acute distress. Dark brown pigmentation is present on his skin creases and oral cavity mucous membranes. Laboratory studies show: Hemoglobin 10.3 g/dL, WBC count 3,000/micro-L, Neutrophils 60%, Monocytes 5%,Eosinophils 10%, Basophils 1%, Lymphocytes 24%, Serum sodium 130 meq/L, Serum potassium 5.5 meq/L. Chest x-ray and PPD tests are normal. What is the most appropriate next step in the management of this patient?

A 56-year-old female comes to the office and complains of general malaise and headaches. Her other symptoms are episodic palpitations, throbbing headaches and diaphoresis. She feels "very anxious all the time." Her past medical history is unremarkable. Her deceased sister had very high blood pressure. Her blood pressure is 230/110 mmHg and pulse is 110/min. Initial laboratory studies reveal: WBC 7,000/cmm, Hb 11.2 g/L, Platelets 325,000/cmm, Calcium 11.9 mg/dl. What is the best next step in the evaluation of this patient?

A 23-year-old man presents to your office complaining of occasional headaches, muscle weakness and fatigue. He also describes periodic numbness of his extremities. The symptoms started 6 months ago and have gradually progressed. His past medical history is insignificant. He is not taking any medication. His blood pressure is 165/104 mmHg and heart rate is 80/min. His physical examination is within normal limits. Which of the following laboratory findings is the most specific for the patient's condition?

A 58-year-old Caucasian male presents with polyuria and polydipsia for the past 4 months. He also reports easy bruising and difficulty in climbing stairs. He weighs 180 lbs (81.6kg) and is 5'7"(170cm) tall. His temperature is 37°C (98.6°F), pulse is 76/min, blood pressure is 155/100 mmHg, and respirations are 15/min. Physical examination reveals significant proximal muscle weakness of all the extremities. Skin examination reveals significant pigmentation on the exposed areas. Lab studies show: Sodium 145 meq/L, Potassium 2.9 meq/L, Bicarbonate 30 meq/L, Fasting blood glucose 240 mg/dL, Hemoglobin 13 g/dL, WBC 14,000/micro-L, Neutrophils 70%, Lymphocytes 23%, Monocytes 5%, Basophils 1%,Eosinophils 1%, 24hr urinary free cortisol 1100 microgram, Plasma ACTH 250 pg/mL (Normal 9-52 pg/mL). High dose dexamethasone suppression test did not decrease the 24 hr urinary cortisol excretion. Which of the following is consistent with this patient's findings?

A 60-year-old white male is hospitalized due to an acute myocardial infarction. His other medical problems include type 2 diabetes mellitus, hypertension, chronic obstructive pulmonary disease, and degenerative joint disease. He admits to smoking 2 packs of cigarettes daily for the past 20 years, as well as drinking 2 bottles of beer daily for the past 15 years. His medications include aspirin, glyburide, metoprolol, enalapril, heparin, and albuterol and ipratropium inhalers. His blood pressure is 140/80 mmHg, pulse is 80/min, respirations are 16/min, and temperature is 36.7°C (98.0°F). During his stay in the hospital, a number of blood tests were ordered. Which of the following lab abnormalities is an indication for thyroid function testing?

A 45-year-old unconscious male is brought to the emergency room. His airway is secured, oxygen is administered, and his vitals are as follows Temperature 36.4°C (97.8°F); PR 102/min; BP 90/65 mmHg; RR 27/min. An IV line is secured and blood and urine samples are drawn. Lab results are as follows: Blood urea nitrogen 40 mg/dl, Calcium 9.1 mg/dl, ALT 50 U/L, AST 60 U/L, Ammonia 15 micro-mol/1 (Normal is 9-33 micro-mol/1), PT 13 sec, APTT 30 sec, Amylase 100 U/L, Glucose 400 mg/dl, Sodium 134 meq/L, Potassium 5.2 meq/L, Chloride 97 meq/L, Bicarbonate 12 meq/L. Arterial Blood Gases: PH 7.19, PaCO2 25 mm Hg, PaO2 80 mm Hg. Blood and urine are positive for ketones. A diagnosis of diabetic ketoacidosis (DKA) is made and IV infusion of normal saline and regular insulin are started. What will be a most reliable index for monitoring the response to treatment?

A 27-year-old woman presents to the office due to a significant amount of hair on her cheeks, chin and upper lips. This symptom developed over the past two months. Her last menstrual period was 12 weeks ago, but she did not seek medical help because her home pregnancy test was negative. Her medical history is unremarkable. She denies taking any medications other than oral contraceptive pills. Physical examination reveals acne on the forehead and cheeks; there is terminal hair on the upper lip, cheeks, chin, upper chest and lower abdomen. Examination of the genitals shows clitoromegaly. The abdominal exam is normal; the uterus is normal in size. Ultrasound reveals a normal uterus and ovaries, but there is a left adrenal mass. Which of the following measurements is most specific for this patient's condition?

A 16-year-old female presents to the office with her mother and complains of changes in her physical appearance over the past year. She first noted the appearance of dark hair on the cheeks, upper lips, around the nipples and umbilicus. Her menstrual cycles have always been irregular since her menarche at age 14. Her medical history is otherwise unremarkable. She denies taking any medications. She has a boyfriend, but claims that she is still not sexually active. Her blood pressure is 115/65 mmHg, pulse is 80/min, respirations are 16/min, and temperature is 37°C (98°F). Pelvic examination could not be performed, and abdominal examination is normal. Ultrasound is normal. Results of the initial work-up are as follows: Serum Na+ 140mEq/L, Serum K+ 4.0mEq/L, Serum Cl- 98 mEq/L, Bicarbonate 25 mEq/L, 1,7-alpha-hydroxyprogesterone elevated. According to these findings, which of the following hormone deficiencies does this patient most likely have?