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肾盂肉瘤样癌临床罕见，本文报道1例。患者因左侧腰腹部疼痛于外院发现肾结石及左肾盂占位，行左侧经皮肾镜取石术+左肾盂肿物活检，活检病理诊断为左肾盂肉瘤样癌。于我院行腹腔镜左肾输尿管切除术，病理诊断为左肾盂肉瘤样癌。术后7个月左侧腹膜后复发，双肺转移，术后10个月死于恶病质。

Sarcomatoid carcinoma of the renal pelvis is rare. One case of sarcomatoid carcinoma of the left renal pelvis was reported. The patient was diagnosed as sarcomatoid carcinoma of left pyelonephrosis by left percutaneous nephrolithotripsy (PCNL) and biopsy of left pyelonephrosis in another hospital due to left lumbar pain.The patient came to our hospital for laparoscopic left hemiculturectomy and was pathologically diagnosed as left renal pelvic sarcomatoid carcinoma. The patient suffered left retroperitoneal recurrence and bilateral lung metastasis 7 months after surgery and died of cachexia 10 months later.