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Cardiac metastasis from renal cell carcinoma (RCC) without inferior vena cava (IVC) involvements is extremely rare with few reportedcases. Sarcomatoid RCC with rhabdoid feature is a rare pathologic type of RCC having aggressive behavior due to greatmetastatic potential. Here, we report a case of rapidly growing cardiac metastasis of RCC which brought on right ventricular outflowtract (RVOT) obstruction without IVC and right atrial involvement in a 61-year-old woman. Cardiac arrest occurred duringradical nephrectomy and echocardiography revealed mass nearly obstructing the RVOT which was not recognized by preoperativeechocardiography 1 month ago. Postoperative immunohistochemical evaluation of renal mass revealed sarcomatoid RCCwith rhabdoid feature.