Diverticular Disease

  • Diverticulosis: The presence of diverticula without associated complications or problems. The condition can lead to more serious issues including diverticulitis, perforation (the formation of holes), stricture (a narrowing of the colon that does not easily let stool pass), fistulas, and bleeding.
  • Diverticulitis: An inflammatory condition of the colon thought to be caused by perforation of one of the sacs. Several secondary complications can result from a diverticulitis attack. When this occurs, it is called complicated diverticulitis.

Diverticulitis Complications

  • Abscess formation and perforation of the colon with peritonitis. An abscess is a pocket of pus walled off by the body. Peritonitis is a potentially life-threatening infection that spreads freely within the abdomen, causing patients to become quite ill.
  • Rectal bleeding
  • Formation of a narrowing of the colon that prevents easy passage of stool (called a stricture)
  • Formation of a tract or tunnel to another organ or the skin (called a fistula). When a fistula forms, it most commonly connects the colon to the bladder. It may also connect the colon to the skin, uterus, vagina, or another part of the bowel.

Learn the Truth about These 3 Diverticular Disease Myths | Gastroenterologist San Antonio


The most commonly accepted theory ties diverticulosis to high pressure within the colon. This pressure causes weak areas of the colon wall to bulge out and form sacs. A diet low in fiber and high in red meat may also play a role. Currently, it is not well understood how these sacs become inflamed and cause diverticulitis.


Most patients with diverticulosis have no symptoms or complications. Some patients with diverticulitis experience lower abdominal pain and a fever or they may have rectal bleeding.


Diverticulosis often causes no symptoms. It may be diagnosed during screening tests such as a colonoscopy. A CT scan of the abdomen and pelvis may be used to confirm the diagnosis of diverticulitis.


Most people with diverticulosis have no symptoms. However, as a preventative measure, it is advised to eat a diet high in fiber, fruits, and vegetables, and to limit red meat.

Most cases of diverticulitis can be treated with antibiotics in pill form or intravenously (IV). Diverticulitis with an abscess may be treated with antibiotics with a drain placed under X-ray guidance.

Surgery for diverticular disease is indicated for the following:

  • A rupture in the colon that causes pus or stool to leak into the abdominal cavity, resulting in peritonitis, which often requires emergency surgery.
  • An abscess than cannot be effectively drained.
  • Severe cases that do not respond to maximum medical therapy including IV antibiotics and hospitalization.
  • Patients with immune system problems (e.g. related to an organ transplant or chemotherapy).
  • A colonic stricture or fistula.
  • A history of multiple attacks may result in a patient deciding to undergo surgery to prevent future attacks.

Surgery for diverticular disease usually involves removal of the affected part of the colon. It may or may not involve a colostomy or ileostomy (intestine brought out through the abdominal wall to drain into a bag). A decision regarding the type of operation is made on a case-by-case basis.


Colon and rectal surgeons are experts in the surgical and non-surgical treatment of diseases of the colon, rectum, and anus. They have completed advanced surgical training in the treatment of these diseases, as well as full general surgical training. Board-certified colon and rectal surgeons complete residencies in general surgery and colon and rectal surgery, and pass intensive examinations conducted by the American Board of Surgery and the American Board of Colon and Rectal Surgery. They are well versed in the treatment of both benign and malignant diseases of the colon, rectum and anus and are able to perform routine screening examinations and surgically treat conditions, if indicated to do so.


The American Society of Colon and Rectal Surgeons is dedicated to ensuring high-quality patient care by advancing the science, prevention and management of disorders and diseases of the colon, rectum and anus. These brochures are inclusive but not prescriptive. Their purpose is to provide information on diseases and processes, rather than dictate a specific form of treatment. They are intended for the use of all practitioners, health care workers and patients who desire information about the management of the conditions addressed. It should be recognized that these brochures should not be deemed inclusive of all proper methods of care or exclusive of methods of care reasonably directed to obtain the same results. The ultimate judgment regarding the propriety of any specific procedure must be made by the physician in light of all the circumstances presented by the individual patient.