An overview of mallet finger injuries.

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Abstract

[Indexed for MEDLINE] Conflict of interest statement: Each author declares that he or she has no commercial associations (e.g. consultancies, stock ownership, equity interest, patent/licensing arrangement etc.) that might pose a conflict of interest in connection with the submitted article. 5. Swan-Neck Deformity. Lane R(1), Nallamothu SV(2). In: StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing; 2026 Jan–. 2025 May 21. Author information: (1)Michigan State Un - Mclaren Oakland (2)Mclaren Oakland/Michigan State Un Swan neck deformity is characterized by proximal interphalangeal (PIP) joint hyperextension and flexion of the distal interphalangeal (DIP) joint. There is also reciprocal flexion noted of the metacarpophalangeal (MCP) joint. This is a result of an imbalance of the extensor mechanism of the digit. The imbalance could be due to a significant laceration or stretching of the extrinsic tendon forces on the distal phalanx or from tightness and pulling of the extensor mechanism, both intrinsic and extrinsic, at the PIP joint. Copyright © 2026, StatPearls Publishing LLC.