619
Views
4
CrossRef citations to date
0
Altmetric
Case Report

Recurrent dislocation of the patella accompanying hypotrochlea of the femur and malalignment of the patella

, , , &
Pages 285-288 | Received 19 Feb 2011, Accepted 08 Jun 2011, Published online: 16 Sep 2011
 

Abstract

This case report describes a rare case of recurrent dislocation of the patella which was accompanied with trochlear dysplasia and malalignment of the patella in a 15-year-old girl. She complained of hemoarthrosis and recurrent patellar dislocation in the early knee flexion phase. Plain radiography and computed tomography (CT) showed patellar malalignment (quadriceps angle 20°) and severe dysplasia of the trochlea of the femur (sulcus angle 170°). Surgery was performed, consisting of trochleoplasty in addition to proximal and distal realignment. Trochleoplasty was undertaken using a modified Dejour technique. After surgery, the patient complained of joint contracture. Arthroscopic release of fibrous tissue relieved symptoms and obtained normal range of motion without patellar dislocation. Postoperative radiography and CT demonstrated improvement of the quadriceps angle (10°) and sulcus angle (140°).

Declaration of interest: The authors report no conflicts of interest. The authors alone are responsible for the content and writing of the paper.