Invasion of a renal cell carcinoma thrombus into the inferior vena cava and right atrium is infrequent. Reaching and completely excising a tumor from the inferior vena cava isR enal cell carcinoma (RCC) is the most prevalent malignant kidney tumor. Although extension of the tumor thrombus into the inferior vena cava (IVC) has been reported in 5% to 10% of cases, 1 extension up to the right-sided heart chambers is seen in only 1% of patients with RCC.2 The mainstay of treatment in these patients is radical nephrectomy with complete surgical removal of the tumor thrombus, including the portions extending into the IVC and right atrium. The usual surgical approach is to combine intra-abdominal and cardiac surgery with cardiopulmonary bypass (CPB) and deep hypothermic circulatory arrest (DHCA); this provides a bloodless surgical field, eliminates the need for IVC cannulation, and facilitates complete removal of the cavoatrial mass.3 However, DHCA has well-known deleterious systemic effects and increases the risk of neurologic complications. 4 To avoid DHCA, we used a selective upper-body perfusion technique during the operation to remove a tumor thrombus extending into the IVC and right atrium in a patient with RCC. We also used a piggyback liver dissection technique to facilitate en bloc tumor resection and patch closure.
Case ReportIn February 2016, a 61-year-old man was referred to our hospital with a diagnosis of RCC in the right kidney and tumor thrombus extending into the IVC and right atrium. The patient, who presented with right flank pain, hematuria, and dysuria, had a history of hypertension, type 2 diabetes mellitus, and hypothyroidism. No abnormalities were found on physical examination, except for a palpable abdominal mass in the right upper quadrant. Routine hematologic and biochemical laboratory tests were conducted, and the results were normal. Computed tomograms revealed a 122 × 98 × 106-mm mass in the right kidney that extended into the IVC and right atrium (Fig. 1). Positron emission tomograms showed no distant metastases. A transthoracic echocardiogram showed a 35 × 27-mm mass in the IVC and right atrium ( Fig. 2A). Cardiac and valvular function were normal. Coronary angiography was performed, and no coronary artery disease was detected. Combined abdominal and cardiac surgery was planned for complete removal of the RCC and tumor thrombus.