A case of sarcomatoid renal cell carcinoma was reported. After admission，laparoscopic radical right nephrectomy was performed without postoperative radiotherapy，chemotherapy or immunotherapy. Five months after operation，the tumor recurred，with lung metastasis and tumor thrombus formation in inferior vena cava. Sarcomatoid renal cell carcinoma is extremely rare clinically，with high malignancy，poor prognosis，atypical symptoms，and no specificity in auxiliary examination. CT is the first choice of examination. At present，the diagnosis is mainly by pathological examination and immunohistochemical staining. The treatment of this disease depends mainly on early surgical resection，and it is not sensitive to radiotherapy or chemotherapy.

A case of sarcomatoid renal cell carcinoma was reported. After admission，laparoscopic radical right nephrectomy was performed without postoperative radiotherapy，chemotherapy or immunotherapy. Five months after operation，the tumor recurred，with lung metastasis and tumor thrombus formation in inferior vena cava. Sarcomatoid renal cell carcinoma is extremely rare clinically，with high malignancy，poor prognosis，atypical symptoms，and no specificity in auxiliary examination. CT is the first choice of examination. At present，the diagnosis is mainly by pathological examination and immunohistochemical staining. The treatment of this disease depends mainly on early surgical resection，and it is not sensitive to radiotherapy or chemotherapy.