Flexor profundus tendon avulsion
Flexor profundus tendon avulsion or jersey finger type 1 of Leddy and Packer (FDP retracted to the palm).
Flexor profundus tendon avulsions or “jersey finger” are especially common among rugby or soccer players who grab the jersey of an opponent. the injury results from forced hyperextension at the DIP joint during active finger flexion. Leddy and Packer classification differentiates five different subtypes of flexor profundus avulsion, based mainly on the level of tendon retraction. This classification has important repercussion in the management and prognosis these injuries.
Type I injuries involve retraction of the proximal stump of the FDP to the palm, and has the worst prognosis of all zone I injuries. In type I Leddy and Packer injury both vincula (longa and brevia) are disrupted, and tendon retracted proximal to the synovial sheath is devoid of nutrition. Repair should proceed within 7 days to avoid tendon contracture and necrosis.
The location of the tendon stumps is an essential preoperative information for the hand surgeon. Axial consecutive MR images are the most useful to identify the proximal tendon stump. [ Article ]
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36-year-old man with a traumatic closed injury of the fourth finger. Loss of active flexion of the distal interphalangeal joint
Courtesy Luis Cerezal, MD PhD
