A rectal lump is a growth in the anal canal or rectal area. Rectal lumps vary in size and the degree to which they produce symptoms. Depending on the underlying cause, a rectal lump may or may not cause any pain. A palpable mass in the anal area may or may not indicate cancer or hemorrhoids. Lumps can be caused by a variety of conditions including anal warts, hemorrhoids, polyps, fissures, or cancer.
Hemorrhoids are probably the most common reason for having a rectal lump. It can be caused by prolapsed internal hemorrhoids, but more commonly by external hemorrhoids. If a rectal lump is related to internal hemorrhoids, it usually gets bigger and more prolapsed right after the bowel movement; it could be spontaneously reduced in the early stage of internal hemorrhoids. But it could be non-reducible in the late stage of hemorrhoids. It may be associated with other symptoms such as bleeding, itch or pain. The thrombosed external hemorrhoids are usually very painful if the varicose veins rupture and the blood clots develop.
Anal warts are caused by human papilloma virus (HPV). HPV infection is considered to be sexually transmitted diseases. Left untreated, anal warts can spread and increase the risk of cancer in the anorectal region.
Anal Fissure is a small cut or split in the anal lining often caused by a painful, hard bowel movement. Fissures are typically located anterior or posterior to the anus. Anal fissure is often associated with a lump called sentinel pile, accompanied by pain and bleeding.
Anal polyps are the growth in the anal canal that must be removed for the biopsy. Further examination with colonoscopy is required for polyps confirmed to be adenomatous in order to check for proximal lesions in the rectum and colon.
Anal cancer occurs in the anal canal, it is account for 2% of cancer in the gastrointestinal tract. An external or internal mass may be palpable. Anal or rectal cancer generally does not produce any pain; some lesions are so soft that they are missed on palpation. Anal cancer can take several forms including ulcers, polyps or verrucous growths.