Volar Dislocation of the Fourth and Fifth Carpometacarpal Joint Associated with Hamate Hook Fracture: A Case Report and Literature Review

Figure 10

Ligamentous structure around the metacarpal bones, hamate hook, and pisiform. 1: flexor carpi ulnaris. 2: volar fifth metacarpal–pisiform ligament (pisometacarpal ligament). 3: volar fifth metacarpal–hamate hook ligament. 4: volar fourth metacarpal ulnar base–hamate hook ligament. 5: metacarpal interosseous ligament (volar fourth metacarpal ulnar base–fifth metacarpal radial base ligament). 6: pisohamate ligament. 7; transverse carpal ligament.