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Combined Fracture of the Hook of the Hamate and Palmar Dislocation of the Fifth Carpometacarpal Joint

From the Institut Kaplan. Barcelona and the Department of Orthopaedic Surgery, Hospital General de Catalunya, Sant Cugat, Spain

Correspondence: M. Garcia-Elias, MD, PhD, Institut Kaplan, P° Bonanova, 9, 2°/2a, 08022 Barcelona, Spain.

A case of fracture of the hook of the hamate associated with a palmar dislocation of the fifth carpometacarpal joint is described. Surgical exploration revealed that the different elements of the flexor carpi ulnaris musculotendinous unit, which includes the pisiform, the pisohamate and pisometacarpal ligaments, were displaced proximally together with the avulsed fragment of the hook of the hamate and the fifth metacarpal. These findings suggest that such an injury results from a sudden, violent contraction of the flexor carpi ulnaris against the fixed wrist. It was successfully treated by open reduction and fixation of the hook of the hamate fracture and stabilization of the carpometacarpal joint.

Journal of Hand Surgery (British and European Volume), Vol. 21, No. 4, 446-450 (1996)
DOI: 10.1016/S0266-7681(96)80043-X


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