The American journal of orthopedics
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Avulsion of the flexor digitorum profundus (rugger jersey finger) commonly occurs in athletes as a result of forced extension of a flexed distal interphalangeal joint. Ultrasound can be a useful tool in defining the anatomy of a tendon avulsion when no fracture is present. ⋯ Use of ultrasound for closed flexor tendon injuries has not been covered enough in the hand surgery literature. We report on the use of ultrasound as a diagnostic tool in evaluating and treating subacute avulsion injuries to the flexor digitorum profundus.