Anal Fissure excision of painful lineal ulcer at margin of anus.
Anal Fistula an abnormal passage or communication which or may not communicate with the rectum.
Anal Cancer surgery usually follows radiation and chemotherapy.
Colon removal (colectomy) for colon cancer and repeated or severe infections of the small outpouchings of the colon called diverticulae (diverticulitis) require the removal of the affected portion of the colon. Additionally there are inflammatory conditions or obstructions that may require removal of part or all of the colon.
Hemorrhoids a varicose dilatation of a vein of the superior or inferior hemorrhoidal plexes.
Hemorrhoid Banding is rubber banding of internal varicose dilatation of a vein of the superior hemorrhoidal plexus originating above the pectinate line covered by mucous membranes.
Rectal prolapse is protrusion of the rectal mucous membrane through the anus.