Osteochondroma
Pronunciation: OS-tee-oh-kon-DROH-ma
Benign bone tumor consisting of cartilage-capped bony projection, most common primary bone tumor.
Full Definition
Osteochondroma is the most common benign bone tumor, characterized by a cartilage-capped bony exostosis that grows away from the adjacent joint. These lesions typically develop during periods of rapid skeletal growth and are most commonly found around the knee (distal femur, proximal tibia) and proximal humerus. While usually asymptomatic, osteochondromas can cause mechanical symptoms, neurovascular compression, or cosmetic concerns. Malignant transformation to chondrosarcoma is rare in solitary lesions but more common in hereditary multiple exostoses.
Usage
Usage note: Most common benign bone tumor; distinguish from enchondroma which is intramedullary.
In Context
- "MRI confirmed a pedunculated osteochondroma arising from the distal femoral metaphysis." — radiology report
- "The patient underwent excision of a symptomatic osteochondroma causing popliteal artery compression." — operative note