Isolated avulsion of a flexor digitorum superficialis tendon insertion

A case of an avulsion of a flexor digitorum superficialis tendon insertion of a healthy white man is presented. Five months after the injury exploration showed that the chiasma of the superficialis had retracted to the region of the distal palmar crease. Excision of the distal portion of the superficialis tendon, the scar surrounding the palmar plate, and release of the palmar plate and collateral ligaments was done. Four months after the operation the active range of motion of the proximal interphalangeal joint ranged from 20 to 105 degrees.