A 31-year-old man presented after a hyperextension injury to his Left middle finger whilst playing rugby. He complained of immediate pain and inability to flex the distal interphalangeal joint. On examination he had bruising to the palmar aspect of the fingertip with loss of the normal cascade. Radiographs revealed an expansile radiolucent lesion within the distal phalanx with endosteal scalloping and thinning of the cortex, in keeping with enchondroma (Figure 1). The volar attachment of the flexor digitorum profundus (FDP) tendon had avulsed and retracted to the midpoint of the middle phalanx (Leddy and Packer type II injury). The enchondroma occupied most of the distal phalanx, however the articular surface was largely maintained.
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