Farajli Abbasi Mohammad, Shojaei Bahador, Azari Omid
Post Graduate Student of Veterinary Surgery, Shahid Bahonar University of Kerman, Kerman, Iran.
Department of Basic Sciences, Faculty of Veterinary Medicine, Shahid Bahonar University of Kerman, Kerman, Iran.
Vet Res Forum. 2017;8(4):361-363. Epub 2017 Dec 15.
Congenital agenesis of lumbar vertebrae was diagnosed in a day-old female lamb based on radiology and clinical examinations. There was no neurological deficit in hindlimb and forelimb associated with standing disability. Radiography of the abdominal region revealed absence of lumbar vertebrae. Necropsy confirmed clinical and radiographic results. No other anomaly or agenesis was seen macroscopically in the abdominal and thoracic regions as well as vertebral column. Partial absence of vertebral column has been reported in human and different animal species, as an independent occurrence or associated with other organs anomalies. The latter has been designated as caudal regression syndrome. Vertebral agenesis may arise from irregularity in the differentiation of somites to the sclerotome or sclerotome to the vertebral primordium. Most of the previously reported cases of agenesis were related to the lumbosacral region, lonely or along with other visceral absences. This case was the first report of congenital agenesis of lumbar vertebrae in a lamb.
通过放射学和临床检查，在一只出生一天的雌性羔羊身上诊断出先天性腰椎发育不全。后肢和前肢没有与站立障碍相关的神经功能缺损。腹部区域的X光检查显示腰椎缺失。尸检证实了临床和放射学检查结果。在腹部、胸部区域以及脊柱上，肉眼未发现其他异常或发育不全。人类和不同动物物种中都曾报道过脊柱部分缺失的情况，其可独立出现或与其他器官异常相关。后者被称为尾椎退化综合征。椎体发育不全可能源于体节向生骨节或生骨节向椎体原基分化过程中的异常。之前报道的大多数发育不全病例都与腰骶部区域有关，单独出现或伴有其他内脏缺失。本病例是首例关于羔羊先天性腰椎发育不全的报道。
