Chronic Kidney Disease USMLE Step 1 Practice Question
A 29 year old man is brought to the emergency department after being found confused in a garage. He is tachypneic. Laboratory studies show an elevated anion gap metabolic acidosis, osmolar gap, and acute kidney injury. Urinalysis reveals envelope shaped crystals. Which of the following substances is the most likely cause of his renal injury?
Answer choices
- ACalcium oxalate generated from ethylene glycol metabolismCorrect answer
- BXanthine from allopurinol overdose
- CUric acid released during tumor lysis syndrome
- DCystine due to impaired renal reabsorption
- EMagnesium ammonium phosphate from urease positive organisms
- FMyoglobin from severe rhabdomyolysis
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