Chronic Kidney Disease USMLE Step 1 Practice Question
A 54-year-old man receiving induction chemotherapy for acute leukemia presents with sudden left flank pain and gross hematuria. Vital signs: BP 138/82, HR 92, RR 18, Temp 37.2°C, SpO2 98%. Urine pH is 5.0 with specific gravity 1.030. Urinalysis microscopy reveals rhomboid crystals and uric acid crystals. Serum uric acid is elevated at 8.2 mg/dL. No fever or dysuria noted. Which of the following is the most likely stone composition?
Answer choices
- AStruvite
- BUric acidCorrect answer
- CCystine
- DCalcium oxalate
- ECalcium phosphate
- FAmmonium magnesium phosphate
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