Mallet finger.

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Abstract

[Indexed for MEDLINE] 6. Am Fam Physician. 2025 Jul;112(1):47-54. Fingertip Injuries. Hilgefort J(1), Becker J(1), Chu J(1). Author information: (1)University of Louisville School of Medicine, Louisville, Kentucky. Family physicians play a pivotal role in providing timely care for common fingertip injuries and minimizing long-term disability after injury. Subungual hematoma is diagnosed clinically and treated with observation or nail trephination. Nail bed lacerations are treated by removal of the nail and repair of the nail bed. Distal interphalangeal joint dislocations typically occur dorsally and result from hyperextension or hyperflexion during sports or because of accidental trauma. Management primarily involves closed reduction and splinting; however, surgical intervention might be necessary for complex cases. Distal phalanx fractures are most often minimally displaced and amenable to closed reduction and splinting; open and intra-articular fractures involving more than one-third of the articular surface require referral to a hand surgeon. Mallet finger comprises rupture of the extensor digitorum tendon or avulsion from the adjacent distal phalanx, inhibiting distal interphalangeal joint extension, and typically heals after 6 to 8 weeks of constant immobilization. Jersey finger involves similar injuries to the flexor digitorum profundus tendon but necessitates referral for surgical repair to restore function.