Poster Presentation New Zealand Association of Plastic Surgeons Annual Scientific Meeting

  An unusual case of a partial FDP (Flexor Digitorum Profundus) avulsion at the tendon-bone insertion   (427)

Jessie Xin Xu 1 , Ziham M Fauzi 1 , Greg McCarten 1
  1. The Canberra Hospital, Phillip, ACT, Australia

Closed rupture of the FDP (flexor digitorum profundus) tendon is uncommon, however when it occurs the most common site of rupture is the tendon-bone insertion at the base of the distal phalanx (P3). Partial ruptures of the FDP at the tendon-bone insertion are extremely rare and is not a well documented phenomenon in medical literature. We describe a case of a 20-year-old right-hand-dominant male who presented with weakness of flexion at the DIPJ (distal interphalangeal joint) after a hyperextension injury to the right ring finger. Radiological investigations revealed an associated fracture of the base of P3 with retraction of the fracture fragment to the head of the middle phalanx. Further MRI imaging revealed 90% avulsion of the FDP tendon, with the remaining 10% still intact at the base of P3. This report will illustrate the mechanism of injury, diagnosis and management of this rare presentation.