[1] The mechanism of injury is thought to be forceful extension of a flexed digit. Avulsion of an isolated flexor digitorum superficialis (FDS) tendon is rare, and the exact pathology is uncertain.

Flexor digitorum superficialis avulsion has also been reported in association with avulsion of the FDP tendon. [3,8,9] The avulsion occurs from the bone at its site of insertion. The present case ...