Congenital Unilateral Lateral Patellar Luxation in a Simmental Calf

In this case report, the surgical treatment of a calf with congenital, unilateral lateral patellar luxation with clinical, radiography, and computed tomography findings is presented. A 5-day-old calf was referred due to an extremely flexed knee joint with hindlimb weakness. Radiographic, computed tomographic, and orthopedic examination demonstrated a grade 3 unilateral lateral patellar luxation with normal stifle bone anatomy. Surgery includes lateral release with medial imbrication of the medial retinaculum and resulted in the repositioning of the patella. After the surgery, the limb was immobilized for ten days. The calf became a normal stance and gait following six weeks after the surgery. In conclusion, lateral release with medial imbrication of the medial retinaculum can be effective just for the treatment of lateral patella luxation in calves.