Formation of calculi of any kind, especially of biliary or urinary calculi. [litho- + G. -iasis, condition]
- l. conjunctivae hard nodules caused by deposition of calcareous material in areas of cellular degeneration in Henle glands.
- 2,8-dihydroxyadenine l. formation of calculi of 2,8-dihydroxyadenine due to a deficiency or reduced activity of adenine phosphoribosyltransferase.
- pancreatic l. the formation of stones in the pancreas, usually associated with chronic inflammation and obstruction of the pancreatic ducts.
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li·thi·a·sis lith-'ī-ə-səs n, pl -a·ses -.sēz the formation of stony concretions in the body (as in the urinary tract or gallbladder) often used in combination <cholelithiasis>
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n.
formation of stones (see calculus) in an internal organ, such as the gall bladder (see gallstone), urinary system, pancreas, or appendix.
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li·thi·a·sis (lĭ-thiґə-sis) [lith- + -iasis] 1. the formation or presence of calculi or other concretions. Numerous types are named for the primary ingredient of the calculi formed; see under calculus. 2. sometimes used as a synonym for one of the specific types of lithiasis, especially urolithiasis, nephrolithiasis, or cholelithiasis.Medical dictionary. 2011.