system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
A previously healthy 31-year-old man comes to the emergency department because of acute onset of left flank pain radiating to his inner groin and scrotum for 3 hours. He also had nausea and one episode of hematuria. His only medication is a multivitamin. He appears uncomfortable. His temperature is 37°C (98.6°F), pulse is 104/min, respirations are 19/min, and blood pressure is 132/85 mm Hg. Physical examination shows marked tenderness in the left costovertebral area. He has normal skin turgor, a capillary refill time of < 1 second, and has been urinating normally. Laboratory studies show:
Serum
Calcium 9.5 mg/dL
Phosphorus 4.3 mg/dL
Creatinine 0.8 mg/dL
Urea nitrogen 15 mg/dL
Urine
pH 6.5
RBCs 50–60/hpf
A CT scan of the abdomen shows a 4-mm stone in the left distal ureter. Intravenous fluid resuscitation is begun and treatment with tamsulosin and ketorolac is initiated. Five hours later, he passes the stone. Metabolic analysis of the stone is most likely going to show which of the following?"
assistant
Calcium oxalate