If you’re preparing for the United States Medical Licensing Examination® (USMLE®) Step 2 exam, you might want to know which questions are most often missed by test-prep takers. Check out this example from Kaplan Medical, and read an expert explanation of the answer. Also check out all posts in this series.
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A 65-year-old woman with metastatic cancer is admitted to the hospital because of severe pain in her left leg for two weeks. The pain is in the left thigh near the hip. She has been having trouble walking because of the pain. The pain is worse at night. She has had no fever, morning stiffness, or trauma. Serum alkaline phosphatase level is 400 U/L. Plain x-ray shows a lytic lesion in the proximal femur.
This patient most likely has a malignancy of which of the following?