Feb 21, - The anus is the opening at the bottom of your intestines where stool Anal cancer is caused by the development of abnormal cells in the body. It's best performed in cancers that are early stage and for tumors that are small. May 23, - Internal hemorrhoids also may protrude (prolapse) outside the anus, where they appear as small, grape-like masses. hemorrhoid, a soft, grape-like mass protruding from the anus that may discharge mucous. For thrombosis of an external hemorrhoid, a painful bulge or firm lump suddenly appears at the.