gallstone

A concretion in the gallbladder or a bile duct, composed chiefly of a mixture of cholesterol, calcium bilirubinate, and calcium carbonate, occasionally as a pure stone composed of just one of these substances. SYN: biliary calculus, cholelith.
- opacifying gallstones gallstones becoming roentgenographically opaque after prolonged exposure to cholecystographic contrast mediums.
- silent gallstones gallstones that cause no symptoms and are discovered by radiographic or ultrasound examination at the time of operation or autopsy.

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gall·stone 'gȯl-.stōn n a calculus (as of cholesterol) formed in the gallbladder or biliary passages called also biliary calculus, cholelith

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n.
a hard mass composed of bile pigments, cholesterol, and calcium salts, in varying proportions, that can form in the gall bladder. The formation of gallstones (cholelithiasis) occurs when the physical characteristics of bile alter so that cholesterol is less soluble, though chronic inflammation of the gall bladder (see cholecystitis) or diminished contractility may also be a contributory factor. Gallstones may exist for many years without causing symptoms. However, they may cause severe pain (see biliary colic) or they may pass into the common bile duct and cause obstructive jaundice or cholangitis Gallstones are usually diagnosed by ultrasonography, but those containing calcium may be seen on a plain X-ray (opaque stones). Cholelithiasis is usually treated by surgical removal of the gall bladder (see cholecystectomy) or by removing the stones themselves, which can be either dissolved using bile salts given by mouth or shattered by ultrasound waves. There is no need for treatment if the stones are causing no symptoms.

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gall·stone (gawlґstōn) a concretion formed in the gallbladder or bile duct; the usual composition is cholesterol, a blood pigment liberated by hemolysis, or a calcium salt. Called also biliary calculus and cholelith. See also cholelithiasis.

Medical dictionary. 2011.

Look at other dictionaries:

  • Gallstone — Classification and external resources Numerous small gallstones, composed largely of cholesterol ICD 10 K …   Wikipedia

  • Gallstone — Gall stone , n. A concretion, or calculus, formed in the gall bladder or biliary passages. See {Calculus}, n., 1. [1913 Webster] …   The Collaborative International Dictionary of English

  • gallstone — 1758, from GALL (Cf. gall) (n.1) + STONE (Cf. stone) (n.) …   Etymology dictionary

  • gallstone — ► NOUN ▪ a small, hard crystalline mass formed abnormally in the gall bladder or bile ducts from bile pigments, cholesterol, and calcium salts …   English terms dictionary

  • gallstone — [gôl′stōn΄] n. a small, solid mass formed in some gallbladders or bile ducts; biliary calculus: it is formed of cholesterol, or, occasionally, of calcium salts, and can obstruct the flow of bile, causing pain, jaundice, and other symptoms …   English World dictionary

  • gallstone — UK [ˈɡɔːlˌstəʊn] / US [ˈɡɔlˌstoʊn] noun [countable] Word forms gallstone : singular gallstone plural gallstones a small hard mass that can form in your gall bladder …   English dictionary

  • gallstone — /gawl stohn /, n. an abnormal stonelike mass, usually of cholesterol, formed in the gallbladder or bile passages. Also called biliary calculus. [1750 60; GALL1 + STONE] * * * Mass of crystallized substances that forms in the gallbladder. The most …   Universalium

  • gallstone — [[t]gɔ͟ːlstoʊn[/t]] gallstones N COUNT A gallstone is a small, painful lump which can develop in your gall bladder …   English dictionary

  • gallstone — noun Date: 1758 a calculus (as of cholesterol) formed in the gallbladder or biliary passages …   New Collegiate Dictionary

  • gallstone — noun A small, hard object, in the shape of a pebble, that sometimes forms in the gallbladder or bile duct; composed of cholesterol, bile pigments and calcium salts …   Wiktionary

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