Anal sac abscessation is diagnosed when there is noticable swelling of the anal sac with a purulent exudate, inflammation of the surrounding perianal region, pain and fever. Rupture of the anal sac can occur with this condition producing a draining tract. | Anal sac abscessation is diagnosed when there is noticable swelling of the anal sac with a purulent exudate, inflammation of the surrounding perianal region, pain and fever. Rupture of the anal sac can occur with this condition producing a draining tract. |