Abstract
Fractures of the distal third of the radius often involve instability of the distal radioulnar and secondary stabilizers. In some cases, reduction of the distal radioulnar is prevented by the interposition of other dislocated structures. Dislocation and interposition of the deep flexor of the fifth finger is rarely observed in this type of fracture. The authors present a review of the literature and the case of a 36-year-old female athlete who presented to the emergency room after a trauma to the wrist, during a barbell exercise. A first radiographic examination showed a fracture of the distal third of the radius and clinically she presented with an apparent deficit in extension of the fourth and fifth fingers. An initial ultrasound examination, performed in the emergency room, did not show any lesions affecting the ulnar nerve. Following an initial reduction and osteosynthesis of the fracture, in which no instability of the distal radioulnar joint or lesions affecting the ulnar nerve were observed, the patient continued to show an apparent deficit in extension of the IV and V fingers. The patient underwent an orthopaedic and radiological re-evaluation, where a dorsal dislocation of the deep flexor of the V finger was highlighted. This article describes the management and treatment of a rare case of dorsal dislocation of the deep flexor of the V finger following a fracture of the distal third of the radius.