Anal atresia associated with rectovaginal fistula in a bitch / Atresia anal associada à fístula retovaginal em cadela

ABSTRACT

Background: Anal atresia, a congenital defect that is common in animals, frequently affects calves and piglets. Its occurrence is associated with a defect in the perforation of the membrane that separates the endodermis of the posterior intestine from the ectodermic membrane of the anus. Anorectal congenital anomalies are rare in dogs and cats, with anal atresia being the most common of them. Anal atresia is a deformity that affects the anal opening and the terminal rectum, resulting in closure of the anal outlet. It can be classifi ed into four types. Clinical signs include the passage of feces through the vulva, vulvar dermatitis, tenesmus, cystitis, megacolon, etc. The diagnosis is based on history, clinical signs, physical examination and supplementary tests. The treatment consists of surgical correction of the fistula, reconstruction of the vagina and of the fi nal portion of the rectum. The objective of this study is to report the surgical correction of a bitch with anal atresia associated with retrovaginal fi stula, with satisfactory recovery of the patient. Case A mongrel bitch with one month of age and body mass of 100 grams was admitted to Hospital de Clínicas Veterinárias of the Universidade Federal do Rio Grande do Sul with a history of feces in the vulva and absence of anal orifi ce. The patient presented tenesmus and was prostrate and underdeveloped in relation...(AU)