What is an angiomyolipoma?

What is an angiomyolipoma?

In angiomyolipoma (AML) — sometimes called renal angiomyolipoma — cells inside your kidney grow in ways that aren’t typical. These cells form a mass called a tumor (neoplasm).

Angiomyolipomas are benign (not cancerous). Fat (adipose), smooth muscle and blood vessels make up these tumors. If the tumor grows too large, it may cause symptoms such as bleeding, anemia, fever and kidney pain.