Central fracture dislocation of the 5th metacarpo-hamate joint

Case contributed by Dr Chris O'Donnell

Presentation

Medial wrist pain following a high speed motor bike accident

Patient Data

Age: 25
Gender: Male

CT scan to help elucidate radiographic findings

Modality: CT

Central fracture dislocation of the metacarpo-hamate joint due to the 5th metacarpal base (arrow) being impacted onto the central hamate. In addition there is a comminuted fracture at the base of the 4th metacarpal due to imoaction with the capitate.

Case Discussion

Unusual injury due to impaction of a clenched wrist against a hard surface causing the hamate to be the cleeved in coronal plane by the 5th metacarpal base. Typically these fracture dislocations are associated with a further impaction injury/fracture to the 4th metacarpal base (against the distal capitate). The more common hamate fracture involves an avulsion of the hook occurring in professional golfers and racquet sports.

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Case Information

rID: 30116
Case created: 20th Jul 2014
Last edited: 19th Mar 2016
Inclusion in quiz mode: Included

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