Management of Distal Phalanx Intraarticular Comminuted Fracture of Small Finger with Zone I Flexor Tendon Avulsion: A Case Report

Distal phalanx fractures are a common injury in both athletes and civilians. These fractures can differ greatly in severity and treatment indications depending on the size, location, and stability of the fracture in addition to appreciation of any bony comminution. Tendon avulsion in conjugation with a fracture complicates treatment and outcomes further. The classification system for these fractures have been well classified to include Type I, II, II, and IV with IV having subtypes. More recently, Type V has been added to the classification system. Designated as a comminuted distal phalanx fracture with flexor digitorum profundus avulsion, this Leddy-Packer type has two subgroups: namely, comminution without intra-articular involvement (Va) and comminution that includes the articular surface. We report the case of a 42-year-old female presenting with injury to the distal phalanx of the right small finger sustained after her dog ran away from her as she held the collar, exerting significant force in opposition to her flexed fingers. Upon exam and following appropriate imaging, her injury was defined as a Leddy and Packer Type Vb jersey finger injury. This was effectively treated with open reduction, internal fixation of the comminuted distal phalanx base and avulsion fragment. A notably rare injury, Leddy-Packer Type Vb distal phalanx avulsion injuries must be treated in a case-by-case basis, but open reduction internal fixation with plating proves an appropriate and effective means of repair in the correct patient.