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(A, B) Longitudinal and transverse US images of a complete tear of the A2 pulley. The pulley in no longer detectable. The flexor tendons present a palmar dislocation (arrows). The space (asterisks) between the tendons and the anterior cortex of the proximal phalanx (PP) is filled with fibrous tissue in (A) (old tear) and with an anechoic effusion in (B) (acute tear).
