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MMLU-Pro / 6451 / A 63-year-old woman comes to the physician 1 day after the sudden onset of pain…

Problem

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question

A 63-year-old woman comes to the physician 1 day after the sudden onset of pain and swelling of her right knee. She has had no injury. Her medications include occasional ibuprofen for mild osteoarthritis of both knees. Her temperature is 37°C (98.6°F), pulse is 97/min, respirations are 19/min, and blood pressure is 129/79 mm Hg. Examination of the right knee shows warmth, erythema, and effusion. Exquisite tenderness is produced with minimal range-of-motion testing. Examination of synovial fluid obtained via joint aspiration shows that it is clear, with positively birefringent rhomboids observed under polarized light microscopy. Deposition of which of the following substances is the most likely cause of these findings? 

category

health

options

  1. Ammonium urate
  2. Magnesium pyrophosphate
  3. Aluminum urate
  4. Potassium oxalate
  5. Calcium oxalate
  6. Calcium sulfate
  7. Sodium pyrophosphate
  8. Calcium urate
  9. Sodium urate
  10. Calcium pyrophosphate

src

ori_mmlu-professional_medicine

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