USMLE Step 1 Quiz
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A 25-year-old woman of Ashkenazi Jewish descent presents with chronic fatigue and a sensation of abdominal fullness. She also notes easy bruising and occasional bone pain in her femurs. Physical examination is significant for massive splenomegaly. A complete blood count reveals pancytopenia. A bone marrow aspirate shows large macrophages with abundant cytoplasm described as having a 'crinkled tissue paper' appearance.
This patient's disorder is caused by a deficiency of which of the following enzymes?
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