AML, also known as angiomyolipoma (AML), is a benign tumor consisting of mature adipose tissue and dysplastic vascular tissue and smooth muscle. AML is asymptomatic in early stage, but with the growth of AML, symptoms of lumbar pain and tumor compression may appear, such as rupture, severe pain, hematuria, nausea, vomiting, and even shock, which may endanger life. Postoperative management: 1. Prevent infection; 2. Anti-pain, anti-emetic, blood transfusion and other symptomatic support treatment; 3. Review blood routine, urine routine, kidney function, etc., and observe the changes of indexes.