Abstract
We report the case of a 69-year-old female patient who sustained a traumatic anterior dislocation of the tibialis posterior muscle tendon. A computed tomography (CT) scan demonstrated an osseous avulsion of the flexor retinaculum with the tendon dislocated underneath it. The patient underwent surgical exploration with reduction of the tendon to its anatomical position and screw fixation of the avulsed fragment. The postoperative course showed pain-free mobility and no signs of tibial posterior muscle tendon insufficiency.