Problem:
23-year-old man presents to the emergency room with malaise and abdominal pain. One week ago, he developed weakness, thirst, and excess urination. Over the last three days he has had severe abdominal pain and has been unable to eat. He has also had two episodes of loose stool and no emesis. He has no significant past medical history. He uses alcohol and marijuana in moderation. Family history is significant for hypertension and coronary artery disease. On examination, temperature is 98.1°F, pulse is 122/min, and blood pressure is 110/60 mmg. He has dry mucous membranes. Heart sounds are tachycardic and regular without murmurs. Lungs are clear to auscultation bilaterally. Abdominal examination identifies diffuse mild tenderness. Laboratory studies are displayed below. Which of the following is the most likely diagnosis in this patient? Blood Counts Patient Chemistry Patient Hemoglobin (g/dL) 17.1 Sodium (mEg/L) 161 Hematocrit (%) 52.5 Potassium (mEq/L) 5.3 Leukocyte count (/mm3) 12,400 Chloride (mEq/L) 115 Platelets (/mm') 440 Bicarbonate (mEq/L) 17 Blood urea nitrogen (mg/dL) 59 Creatinine (mg/dL) 2.0 Glucose (mg/dL) 625 (A) Diabetes insipidus (B) Gastroenteritis (C) Hyperaldosteronism (D) Hypercortisolism (E) Ketoacidosis. Need Assignment Help?