Superior dislocation of the patella: a case report.

Cusco, Xavier; Seijas, Roberto; Ares, Oscar; Cugat, Jose R; Garcia-Balletbo, Montserrat; Cugat, Ramon · J Orthop Surg Res · 2009

case_report · Level V

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Abstract

Superior dislocation of the patella is an uncommon condition that mainly occurs in knees with a high patella and medial femorotibial degenerative arthritis. There are no previous reports of this condition occurring in association with tibial valgus osteotomy. We report the case of a patient in whom vertical dislocation recurred twice at 4 months after tibial valgus osteotomy. To avert additional recurrence or new dislocations, the patient was treated surgically to remove the existing osteophytes. An arthroscopic approach was decided because of the lower associated morbidity and good results with this technique compared to open surgery.

Anatomy