Carpal boss

Case contributed by Bahman Rasuli
Diagnosis certain


Chronic left wrist pain at dorsal aspect.

Patient Data

Age: 20 years
Gender: Female

Bony protuberance at the site of swelling pointed by the patient is prominent osteophytes at the base of the third metacarpal and its articulation with the capitate bone representing carpal boss. Ganglion cyst is not seen.

Case Discussion

The carpal boss is a hypertrophied bony protuberance on the dorsal surfaces of the base of the second or third metacarpals, near the capitate and trapezium. It may be bilateral.

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