What is the incidence of lower gastrointestinal (GI) neoplastic bleeding?

Updated: Jul 26, 2019
  • Author: Burt Cagir, MD, FACS; Chief Editor: BS Anand, MD  more...
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Neoplastic bleeding can be from a polyp or carcinoma. Colon cancer is the predominant cause of neoplastic bleeding and is responsible for around 10% of rectal bleeding in patients older than 50 years. The bleeding is usually low grade and recurrent, occurring as a result of mucosal ulceration or erosion. Although neoplastic bleeding can present as bright red blood per rectum, it is unusual for it to cause massive colonic bleeding.

Postpolypectomy bleeding occurs in approximately 0.1%-3% of patients, is more often arterial, and can produce significant bleeding. Bleeding can occur at the time of polypectomy, but it can also manifest several hours to a few weeks after the procedure.

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