Department of Veterinary Pathology, Hygiene, and Public Health, Veterinary University Hospital, Università degli Studi di Milano, Lodi, Italy.
Vet Pathol. 2013 Jan;50(1):156-8. doi: 10.1177/0300985812446154. Epub 2012 May 2.
Atresia ani, a congenital anomaly of the anus, can be associated with other types of malformation. Two female Holstein Friesian calves had imperforate anus, rectovaginal fistula, and perineal choristomas. In one case, the choristoma was composed of mature adipose and fibrous tissue with nephrogenic rests. In the other calf, the choristoma consisted of fragments of trabecular bone coated by cartilage and containing marrow, mixed with mature adipose and fibrous tissue, striated muscle fibers, nerves, and vessels. This combination of malformations resembles the association of anorectal malformations and perineal masses in children.
肛门闭锁是一种肛门先天畸形，可与其他类型的畸形相关。两头荷斯坦弗里生小母牛患有肛门闭锁、直肠阴道瘘和会阴包涵体。其中一头包涵体由成熟的脂肪和纤维组织以及肾原基组成。另一头包涵体由覆有软骨的小梁骨碎片组成，含有骨髓，与成熟的脂肪和纤维组织、横纹肌纤维、神经和血管混合在一起。这种畸形组合类似于儿童肛门直肠畸形和会阴肿块的关联。
