Abstract
Sarcomatoid renal cell carcinoma (SRCC) is a rare variant of renal cell carcinoma associated with an unfavorable prognosis. The efficacy of conventional chemotherapy and targeted therapies are limited, whereas the emergence of immune checkpoint inhibitor has introduced new avenues for managing advanced SRCC. A 77-year-old female patient was referred to our hospital following the incidental detection of a right kidney tumor without specific symptoms. The tumor was successfully resected, and subsequent pathological examination confirmed SRCC. She experienced both local recurrence and distant metastasis eight months after the initial laparoscopic resection. Following six cycles of toripalimab combined with pirarubicin chemotherapy, the patient achieved a partial response. Subsequently, the patient attained an almost-complete continuous response to toripalimab monotherapy maintenance for an additional six cycles. She has not experienced disease progression for 15 months, and her overall survival has reached 24 months thus far. Combination therapy with programmed death 1 antibodies and cytotoxic agents may be a recommended first-line treatment approach for SRCC.
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