Congenital medial dislocation of the patella with multiple congenital anomalies: case report and method of treatment.

Lateral dislocation of the patella is reported frequently in orthopaedics references but congenital medial patellar dislocation is reported rarely. An 8-year-old girl was referred to our department for knee surgery. She had genuvarum, knee flexion contracture and tibial internal rotation. She had multiple congenital anomalies at birth. The patella was palpated in the medial side of knee and its reduction to the midline was impossible. We performed an operative procedure for her medial dislocation of the patella. At the 1-year follow-up, the patella was in midline and there was no medial subluxation on range of motion of the knee. In infants with genuvarum, knee flexion contracture and tibial internal rotation, the possibility of medial patellar instability should be considered. For correction of patellar tracking and prevention of bone deformities, surgical management should be performed.