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Perilunate dislocations are a devastating injury to the carpus that carry a guarded long-term prognosis. Mayfield type 4 perilunate dislocations are rare, high-energy injuries that carry a risk for avascular necrosis (AVN) of the lunate. When AVN ensues and the carpus collapses, primary treatment with a proximal row carpectomy or arthrodesis has been advocated. This case reports a successful clinical result and revascularization of an extruded lunate with open reduction and internal fixation. This type 4, Gustilo grade 1 open perilunate dislocation exhibited complete avulsion of all lunate ligamentous attachments. Management included open reduction and internal fixation as well as carpal tunnel release through a combined dorsal and volar approach. Despite concerns for lunate AVN due to complete disruption of lunate vascularity, a 10-month postoperative clinical and radiographic examination demonstrated no pain with activities of daily living as well as a revascularized lunate.

Open perilunate injury with lunate revascularization after complete ligamentous avulsion