This 46-year-old female was told to have a right renal tumor several years ago in a health examination. Follow-up computed tomography images revealed a fat-containing tumor with invasion of right renal vein and inferior vena cava. Right radical nephrectomy and cavotomy were performed and aggressive renal angiomyolipoma was impressed. We found the characteristic imaging finding of early renal vein invasion of the aggressive renal angiomyolipoma by comparison of the serial follow-up images.