The paranal sinuses were rounded small pear shape sacs on both sides of the anal and can be palpated just above the ischiatic tuberosities and have a capacity of about 1-2 ml. It was surrounded by the M. sphincter ani externus. The pelvic diaphragm has three muscles two of them were skeletal; type M.levator ani and M.coccygeus which were present cranial to perineal fat located in the ischiorectal fossa, while was smooth as it was the direct continuation of the rectal wall muscles, M.rectococcygeus. THe internal pudendal artery branch from the internal iliac artery, was the main blood supply of the perineal region. The pudendal nerve also supplied this region, together with the caudal rectal nerve. The surgical approach for the infected anal sacs was carried out by filling materials of different types inside the anal sacs as duracryl, technovit, plaster of paris, latex, liquid paraffin, gauze,cotton, 
distilled water and indian ink. The operative procedure was described in details using ordinary instruments or the diathermy apparatus. The obtained results revealed that the plaster of paris was excellent, Duracryl and technovit were also very good material for the filling oa anal sac
 
Keywords: Surgical, anatomical studies, perineal region, dog, extirpation, anal glands.