Isolated Rupture of the Short Head of the Biceps at the Proximal Musculotendinous Junction: A Report of Two Cases.

CASE: Two men aged 19 and 21 years sustained wakeboarding injuries where the towrope was forced against the anterior region of the arm. Physical examination revealed bruising and tenderness over the biceps with weakness in elbow flexion. Magnetic resonance imaging demonstrated complete musculotendinous rupture of their short head of biceps. Surgical repair followed by cast immobilization led to an excellent outcome in both cases. CONCLUSIONS: This is a unique series of complete musculotendinous rupture of the short head of the biceps occurring in wakeboarding accidents, with the mechanism of injury resisted shoulder adduction and flexion.