Renal angiomyolipoma with lymph node involvement: a case report and literature review.

Renal angiomyolipomas (AMLs) are relatively common tumors containing fatty tissue, blood vessels, and muscular cells in various proportions. Typical AMLs can be diagnosed without histological confirmation by a combination of ultrasound and computed tomography imaging in up to 95% of cases. In contrast, simultaneous involvement of the kidney, renal vein, or lymph nodes is uncommon and might be confused with a metastasizing malignant tumor. We present a pathologically proven case of the very uncommon simultaneous involvement of the kidney and the lymph nodes in AML.