Type 5 avulsion of the insertion of the flexor digitorum profundus tendon.

Four cases of avulsion of the insertion of the flexor digitorum profundus tendon with an osseous fragment are presented. In each case, there was another significant fracture of the distal phalanx. The current classification system for flexor profundus avulsions is reviewed and an extended classification is offered which considers such avulsions. Copyright 2001 The British Society for Surgery of the Hand.