Closed flexor pulley rupture of the thumb
Sudden pain and snapping sensation in the the thenar region in a recreational rock climber. Bowstringing of the FPL tendon on flexion.
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Inccreased distance between the flexor pollicis longus (FPL) tendon and the proximal phalanx, heamorrhage in between.
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Ruptures of the annular ligaments of the flexor tendon sheaths are typical injuries in rock climbers. However, the thumb is only rarely affected1. Its pulley anatomy is different from that of the long fingers2.
- 1. Kosiyatrakul A, Jitprapaikulsarn S, Durand S et-al. Closed flexor pulley rupture of the thumb: case report and review of literature. Hand Surg. 2009;14 (2-3): 139-42. Hand Surg (link) - Pubmed citation
- 2. Bayat A, Shaaban H, Giakas G et-al. The pulley system of the thumb: anatomic and biomechanical study. J Hand Surg Am. 2002;27 (4): 628-35. J Hand Surg Am (link) - Pubmed citation