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A marker is placed dorsal to the space between the distal third and fourth digits.
Third digit (middle/long finger):
- Complete rupture of the third flexor digitorum profundus tendon at its insertion on the distal phalanx with retraction to the level of the proximal interphalangeal joint
- Near complete rupture of the third flexor digitorum profundus tendon at the level of the mid metacarpal
- Chronic appearing comminuted fracture of the base of the distal phalanx
- Normal flexor digitorum superficialis tendons
- Soft tissue edema in the volar aspect of the digit
Fourth digit (ring finger):
- Comminuted fracture of the base of the distal phalanx, with
- 4 mm displacement of the osseous fragment
- marrow edema within the distal phalanx
- involvement of the volar plate
- Normal flexor digitorum profundus and superficialis tendons
- Soft tissue edema in the volar aspect of the digit