A 14 year old boy has pain in his leg. He is later found to have an osteosarcoma of his femur


Question:  USMLE step 1 Mcq 9
A 14 year old boy has pain in his leg. He is later found to have an osteosarcoma of his femur. 'Osteo' means bone. What does the suffix 'sarcoma' refer to?

a) a benign lesion
b) malignancy of a tissue of epithelial origin
c) a malignancy of a tissue of mesenchymal origin
d) a malignancy of white blood cells
e) a malignancy of the immune system

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