20 yo/F presents with left wrist discomfort ~ 12 months duration. Left ulnar N distribution discomfort that awakes her. No prior surgeries, carcinoma or corticosteroid regimen.
What do you see?
Osteochondroma represents the most common bone tumor is an aberration of enchondral ossification, NOT a true neoplasm. (1) Complications include: cosmetic and osseous deformity fracture, neurologic sequlae as in our case.
KEY FACTS: (2)
Bony protrusion covered by a cartilaginous cap.
Growth in childhood takes place in the cap, corresponding to normal enchondral growth at the growth plates.
A thick cartilaginous cap in an adult is suspicious of chondrosarcoma.