Colorectal diseases Pilonidal sinus (hair cyst) Rectal prolapse Colon cancer Crohn’s disease Purulent hidradenitis Rectovaginal fistula Perianal abscess (purulent accumulation around the anus) hemorrhoids Rectal cancer Ulcerative colitis Colonic diverticulum Fistula Anal fissure Single ulcer of the rectum Anal cancer Condyloma and papilloma virus