ePlasty: Vol. 20
Complex Metacarpophalangeal Dislocation
Minh Thu An, BS,a Joshua P. Kelley, MD,a,b Matthew P. Fahrenkopf, MD,a,b John P. Kelpin, MD,a,b Nicholas S. Adams, MD,a,b and Viet Do, MDa,b,c

aMichigan State University College of Human Medicine, Grand Rapids; bSpectrum Health/Michigan State University Plastic Surgery Residency, Grand Rapids; and cOrthopedic Associates of Michigan, Grand Rapids

Key words: metacarpophalangeal joint dislocation, complex dislocation, volar plate, index dislocation, open reduction

DESCRIPTION

A 16 year-old-male patient presented to the emergency department with a hyperextension injury at the left index finger, with resultant deformity of the metacarpophalangeal (MCP) joint. On examination, volar skin dimpling was noted and sensation was normal. Posteroanterior and lateral radiographs were obtained (Figs 1a and 1b). Closed reduction was unsuccessful, so the patient was taken to the operating room for open reduction.

Figure 1. Posteroanterior (a) and lateral (b) radiographic images showing dorsal dislocation of the left index metacarpophalangeal joint and ulnar shift of the proximal phalan .......