Robotic-assisted cytoreductive partial nephrectomy for metastatic sarcomatoid renal cell carcinoma following dramatic response to combination immunotherapy in a young female.

Novel immune checkpoint inhibitors (ICI) have yielded remarkable response rates in metastatic renal cell carcinoma (RCC), including sarcomatoid RCC (sRCC). Here, we show the feasibility and efficacy of robotic-assisted cytoreductive partial nephrectomy (cPN) following a remarkable response to combination ICI for metastatic sRCC in a young female. A female in her late 40s presented with poor-risk, metastatic sRCC emanating from a 6.5 cm left renal mass including pulmonary involvement, retroperitoneal lymphadenopathy, and a scalp metastasis. She received 4 cycles of combination ipilimumab and nivolumab followed by maintenance nivolumab with a remarkable and durable response. Given the apparent downstaging of her primary tumor, a robotic cPN was pursued for residual ypT1aNoRo sRCC and found to be both feasible and safe with exceptional perioperative outcomes. She has since done well clinically and oncologically. Our unique case of metastatic sRCC in a young female highlights several aspects pertinent to the contemporary management of metastatic RCC including the role for cytoreductive nephrectomy in selected patients, the safety and feasibility of a nephron-sparing and minimally-invasive approach to cytoreduction after downstaging with ICI, and remarkable sensitivity of sRCC-a classically aggressive entity-to ICI.