Entrapment of the Volar Plate in the Retrocondylar Space of the Proximal Interphalangeal Joint Necessitating Open Reduction and Internal Fixation: A Case Report

Fracture-dislocations of the proximal interphalangeal joint (PIPJ) can have a significant impact on digital motion and hand function if inappropriately treated. While these injuries are commonly encountered, they can be quite challenging to manage. It is critical to ensure a concentric reduction and early motion when treating these injuries. A 17-year-old woman sustained a fracture-dislocation of the PIPJ of the left small finger. Despite a concentric closed reduction, she had pain and a mechanical block to PIPJ motion. Advanced imaging revealed volar plate entrapment in the retrocondylar space. She was treated with open reduction and direct volar plate repair. Postoperatively, the patient had an excellent outcome with no complications. Our case highlights the importance of both performing an anesthetized examination and investigating the etiology of any limitations to motion even if there is an initial acceptable closed reduction.