A flexor tendon rupture in the palm of the hand.

Traumatic, subcutaneous ruptures of flexor tendons in the hand are infrequent findings in clinical practice. They usually occur at the bony insertion or at the musculotendinous junction. Intratendinous ruptures are reported almost only in association with underlying pathologic conditions. We report a case of subcutaneous rupture through the healthy substance of the profundus flexor tendon of the small finger in the palm of the hand, which was associated with a complete tendinous fusion between the deep flexor of the ring and small finger up to the lumbrical insertion.