Atresia anal grau IV em cão – relato de caso

Anal atresia consists of a rare congenital abnormality that occurs in puppies, being incompatible with life if left untreated. It is characterized by persistent anal membrane during embryological development and can be classified into four grades (grades I, II, III and IV). At first, the signs may be noticeable due to the constant cleaning of the mother of the puppies. The diagnosis is performed by clinical and laboratory tests, such as X-ray and ultrasound, which can determine the stage of the disease. The prognosis is variable, depending on the degree of the disease, on the early diagnosis and patient's general condition. This article reports a case of grade IV anal atresia associated with rectovaginal fistula in a dog Poodle breed, female, with 30 days of life. The animal underwent surgery to correct the defect, which was obtained success.