Angiomyolipoma (AML) is the most common benign solid renal tumor. AML is typically a solid “triphasic” tumor composed of varying amounts of three elements: dysmorphic blood vessels, smooth muscle components, and mature adipose tissue. They are further divided into fat-rich, fat-poor and fat-invisible AML. AML is usually detected incidentally. AML is also seen in patients with tuberous sclerosis complex (TSC) and lymphangioleiomyomatosis (LAM).

In our case, the AMLs show abundant fat, indicating fat-rich AML.