Fifty one animals of different species suffering expected affections (12 cattle, 3 buffalo, 21 sheep mad 13 equine) were admitted to the Surgery Clin-x, Faculty of Veterinary Medicine, Zagazig Uni- vemy, during a four year period (1995-1999).Diagnosis of different affections was carried out through history, clinical and histopathological examination. The diagnosed affections were common cloaca, atresia ani, atresia ani et recti, atresiaSih tilessness, atresia ani with rectovaginal ‘Sul, complicated atresia ani, rectal prolapse, high  number of congenital affections was recrded in  sheep followed by calves while the high number of acquired affection was recorded in donkeys. uncommon affection as common cloaca in calves, and sacoids and hemangiosarcoma as preanal tumers were recorded in this study. All the affected animals were surgically dealt with successfully except perianal melanoma in equine (2 cases) where surgery was precluded.