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Orthopaedics · Bone tumours: metastases
Sample itemA 62-year-old man has a lytic lesion in the femur on a radiograph and no known cancer. Which group of primary sites most commonly gives skeletal metastases?
Original practice item, not a recalled exam question. Nothing here is recorded.
The answer and the reasoning
B. Breast, prostate, lung, kidney and thyroid
Breast, prostate, lung, kidney and thyroid carcinomas account for most bone metastases. Prostate gives sclerotic lesions, whereas kidney and thyroid give purely lytic expansile ones.
Option by option
A. Brain, skin, retina, nasopharynx and eye
Brain tumours and retinoblastoma rarely metastasise to bone, and the list mixes unlikely sites.
B. Breast, prostate, lung, kidney and thyroid (correct)
Correct. These five are the classic bone-seeking primaries.
C. Stomach, colon, ovary, cervix and pancreas
These cancers metastasise to bone less often.
D. Liver, gallbladder, spleen, bladder and testis
These primaries are less frequent sources of skeletal deposits.
Source note: Original NextPrep sample item — pending expert review. This item is original practice material awaiting independent expert review, so confirm important facts in a standard textbook.
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