The following are multiple choice questions (with answers) about medical knowledge.   **Question:** A 55-year-old man is brought to the emergency department with altered mental status. The patient is in acute distress and cannot provide history due to disorientation. Temperature is 38.7°C (101.6°F), blood pressure is 80/50 mm Hg, pulse is 103/min, respiratory rate is 22/min, and BMI is 20 kg/m2. On examination, his sclera and skin are icteric. On abdominal examination, the patient moans with deep palpation to his right upper quadrant. Laboratory test Complete blood count Hemoglobin 14.5 g/dL MCV 88 fl Leukocytes 16,500/mm3 Platelets 170,000/mm3 Basic metabolic panel Serum Na+ 147 mEq/L Serum K+ 3.8 mEq/L Serum Cl- 106 mEq/L Serum HCO3- 25 mEq/L BUN 30 mg/dL Serum creatinine 1.2 mg/dL Liver function test Total bilirubin 2.8 mg/dL AST 50 U/L ALT 65 U/L ALP 180 U/L The patient is treated urgently with intravenous fluid, dopamine, and broad spectrum antibiotics. The patient’s blood pressure improves to 101/70 mm Hg. On ultrasound of the abdomen, the common bile duct is dilated. What is the best next step in the management of this patient?   (A) ERCP   (B) MRCP   (C) Percutaneous transhepatic cholangiogram   (D) CT abdomen
['(A) ERCP <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) ERCP \n (B) MRCP \n (C) Percutaneous transhepatic cholangiogram \n (D) CT abdomen <> possible answers', '  A 55-year-old man is brought to the emergency department with altered mental status. The patient is in acute distress and cannot provide history due to disorientation. Temperature is 38.7°C (101.6°F), blood pressure is 80/50 mm Hg, pulse is 103/min, respiratory rate is 22/min, and BMI is 20 kg/m2. On examination, his sclera and skin are icteric. On abdominal examination, the patient moans with deep palpation to his right upper quadrant.\nLaboratory test\nComplete blood count\nHemoglobin 14.5 g/dL\nMCV 88 fl\nLeukocytes 16,500/mm3\nPlatelets 170,000/mm3\nBasic metabolic panel\nSerum Na+ 147 mEq/L\nSerum K+ 3.8 mEq/L\nSerum Cl- 106 mEq/L\nSerum HCO3- 25 mEq/L\nBUN 30 mg/dL\nSerum creatinine 1.2 mg/dL\nLiver function test\nTotal bilirubin 2.8 mg/dL\nAST 50 U/L\nALT 65 U/L\nALP 180 U/L\nThe patient is treated urgently with intravenous fluid, dopamine, and broad spectrum antibiotics. The patient’s blood pressure improves to 101/70 mm Hg. On ultrasound of the abdomen, the common bile duct is dilated. What is the best next step in the management of this patient? <> context@']