The present report describes the surgical treatment of a congenital lateral patellar luxation in a 6-month-old female donkey foal. The foal was presented with a slight crouched position, muscle atrophy, moderate lameness, reluctance to flex the right hindlimb at a walk and slight effusion of the right stifle joint. The foal responded painfully to the stifle flexion test. Irreducible lateral luxation of the right patella was confirmed on physical examination and radiography. The animal was treated surgically by recession trochleoplasty and imbrication of the medial joint capsule. The animal gradually improved after surgery, and good clinical results were reported after 6 months post-operatively. In conclusion, congenital lateral luxation of the patella should be considered as a congenital cause of lameness in donkeys and surgical repair by recession trochleoplasty and medial imbrication of the joint capsule can be helpful to treat this problem.

中文翻译：

---

小驴后退滑车成形术治疗先天性髌骨外侧脱位

本报告描述了 6 个月大的母驴驹先天性髌骨外侧脱位的手术治疗。小马驹表现出轻微的蹲伏姿势，肌肉萎缩，中度跛行，在行走时不愿弯曲右后肢，右膝关节有轻微积液。小马驹对膝关节屈曲试验做出了痛苦的反应。体格检查和 X 光检查证实了右侧髌骨不可复位的外侧脱位。动物通过后退滑车成形术和内侧关节囊覆瓦状进行手术治疗。手术后动物逐渐好转，术后6个月临床效果良好。综上所述，