Angiomyolipomas (AMLs) refer to hamartomatous lesions composed of abnormal, thick-walled vessels (i.e. angio) and varying amounts of smooth muscle–like cells (i.e. myo) and adipose tissue (i.e. lipoma) They predominantly occur in the kidney (renal angiomyolipoma) but occasionally occur in other organs such as the liver (hepatic angiomyolipoma).
Very rarely they can occur in unusual locations such as
- skin - cutaneous angiomyolipoma
- retroperitoneum - retroperitoneal angiomyolipoma