PDF(Pubmed)
Abstract：
A 2-day-old Cleveland Bay colt was referred to the Equine Emergency Service of the Farm Animal and Equine Veterinary Medical Center at North Carolina State University\'s College of Veterinary Medicine for evaluation of decreased nursing behaviour and right hindlimb lameness of 2 days\' duration. When assisted to stand, the foal was unable to extend either hindlimb or bear weight on the hindlimbs, the right patella was luxated laterally and unable to be reduced, and the foal assumed a crouched position. Stifle radiographs revealed minimal, heterogeneous, ill-defined ossification of both patellae. Due to the severity of the musculoskeletal defects, humane euthanasia was elected. Post-mortem examination identified a congenital malformation of both patella bones with failure of ossification and cardiac changes suggestive of right atrioventricular valve dysplasia. Histology of the patellae showed no evidence of osteoid deposition or ossification. To our knowledge, bilateral congenital patellar aplasia has not been previously described in foals.
摘要：
一只2天大的克利夫兰湾小马驹被转介给北卡罗来纳州立大学兽医学院农场动物和马兽医医学中心的马紧急服务，以评估护理行为的减少和右后肢跛行2天的持续时间。当辅助站立时，小马驹既不能伸展后肢，也不能承受后肢的重量，右髌骨横向脱位，不能复位，小马驹采取了蹲伏的姿势。立体射线照片显示最小，异质，髌骨骨化不明确。由于肌肉骨骼缺陷的严重程度，人道安乐死当选。验尸后发现髌骨均先天性畸形，骨化失败，心脏变化提示右房室瓣发育不良。髌骨的组织学没有显示骨样沉积或骨化的证据。据我们所知,以前没有在马驹中描述过双侧先天性髌骨发育不全。
