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Pathology · Neoplasia: hypertrophic osteoarthropathy
Sample itemA 62-year-old smoker has painful swollen wrists and ankles, digital clubbing and periosteal new bone on radiographs of the long bones. What is the most likely cause?
Original practice item, not a recalled exam question. Nothing here is recorded.
The answer and the reasoning
B. Bronchogenic carcinoma
Hypertrophic osteoarthropathy (clubbing, periostitis, arthritis) is a paraneoplastic syndrome seen with lung cancer, particularly non-small cell, and also with chronic suppurative lung disease and cyanotic heart disease. Resolving the primary tumour often relieves the symptoms.
Option by option
A. Osteosarcoma of the femur
A bone sarcoma is a local lesion and does not cause diffuse periostitis.
B. Bronchogenic carcinoma (correct)
Correct. Lung carcinoma is the commonest neoplastic cause of this syndrome.
C. Rheumatoid arthritis
Rheumatoid arthritis causes erosions and does not produce clubbing and periosteal new bone.
D. Gout
Gout causes episodic crystal arthritis with tophi.
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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