Gallstones


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Definition

Gallstones are hard, pebble-like deposits that form inside the gallbladder. Gallstones may be as small as a grain of sand or as large as a golf ball.

See also:


Alternative Names

Cholelithiasis; Gallbladder attack; Biliary colic; Gallstone attack; Biliary calculus


Causes, incidence, and risk factors

The cause of gallstones varies. There are two main types of gallstones:

  • Stones made of cholesterol, which are by far the most common type. Cholesterol gallstones have nothing to do with cholesterol levels in the blood.
  • Stones made of bilirubin, which can occur when red blood cells are being destroyed (hemolysis). This leads to too much bilirubin in the bile. These stones are called pigment stones.

Gallstones are more common in women, Native Americans, Hispanics, and people over age 40. Gallstones may also run in families.

The following also make you more likely to develop gallstones:

  • Bone marrow or solid organ transplant
  • Failure of the gallbladder to empty bile properly (this is more likely to happen during pregnancy)
  • Liver cirrhosis and biliary tract infections (pigmented stones)
  • Medical conditions that cause the liver to make too much bilirubin, such as chronic hemolytic anemia, including sickle cell anemia
  • Rapid weight loss from eating a very low-calorie diet, or after bariatric surgery
  • Receiving nutrition through a vein for a long period of time (intravenous feedings)

References

Siddiqui T. Early versus delayed laparoscopic cholecystectomy for acute cholecystitis: a meta-analysis of randomized clinical trials. Am J Surg. 2008;195(1):40-47.

Chari RS, Shah SA. Biliary system. In: Townsend CM, Beauchamp RD, Evers BM, Mattox KL. Sabiston Textbook of Surgery. 18th ed. St. Louis, Mo: WB Saunders; 2007:chap. 54.

Wang DQH, Afdhal NH. Gallstone disease. In: Feldman M, Friedman LS, Brandt LJ, eds. Sleisenger & Fordtran's Gastrointestinal and Liver Disease. 9th ed. Philadelphia, Pa: Saunders Elsevier; 2010:chap 65.

Glasgow RE, Mulvihill SJ. Treatment of gallstone disease. In: Feldman M, Friedman LS, Brandt LJ, eds. Sleisenger & Fordtran's Gastrointestinal and Liver Disease. 9th ed. Philadelphia, Pa: Saunders Elsevier; 2010:chap 66.


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Review Date: 8/11/2011
Reviewed By: Linda J. Vorvick, MD, Medical Director, MEDEX Northwest Division of Physician Assistant Studies, University of Washington, School of Medicine; and George F. Longstreth, MD, Department of Gastroenterology, Kaiser Permanente Medical Care Program, San Diego, California. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.
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Last Updated 10/4/2011
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