angiomyolipoma

noun

an·​gio·​myo·​li·​po·​ma ˌan-jē-ō-ˌmī-ə-lī-ˈpō-mə, -li- 

plural angiomyolipomas also angiomyolipomata -mə-tə 

: 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)

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,