Medical Definition of angiomyolipoma
: a benign tumor composed of blood vessels, smooth muscle, and fat that occurs especially in the kidney and that is often asymptomatic but may cause pain or blood in the urine … angiomyolipomas are often part of a syndrome called tuberous sclerosis.—Paul G. Donohue, The Star Ledger (Newark, New Jersey), 9 Dec. 1999 Macroscopic fat within a renal mass, identified by means of CT or magnetic resonance imaging (MRI), is diagnostic of angiomyolipoma (a benign mass), unless calcification is present, which would indicate a malignant condition.—Inderbir S. Gill, The New England Journal of Medicine, 18 Feb. 2010
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