J Korean Orthop Assoc.  1976 Sep;11(3):455-457. 10.4055/jkoa.1976.11.3.455.

The Carpometacarpal Boss

• Ha KI
• Pil DJ

• KMID: 2461291
• DOI: http://doi.org/10.4055/jkoa.1976.11.3.455

Abstract

The carpometacarpal boss is a bone prominence involving the carpometacarpal joints of the index and long fingers. In 1931 Fiolle described a bone lesion located the dorsum of his right wrist. He initially believed this to be primarily a carpal lesion and then called it a carpe bossu (carpal boss). The cause of the lesion has been thought to be the result either of a childhood fracture, or of an occupational strain or of periostitis secondary to the pull of the extensor carpi radialis brevis tendon insertion. A congenital predisposition, os styloideum, has also been suggested. We experienced three patients possessing a total of five lesions which showed that repeated mechanical stress in four and os styloideum in one were implicated in the etiology of this deformity.

MeSH Terms

Carpometacarpal Joints
Carps
Congenital Abnormalities
Fingers
Humans
Periostitis
Stress, Mechanical
Tendons
Wrist