肾脏炎性假瘤临床上少见,目前称之为炎症性肌纤维母细胞瘤,新的WHO标准将其定义为由分化的肌纤维母细胞性梭形细胞组成的,常伴有大量浆细胞和(或)淋巴细胞的一种肿瘤。由于其缺乏特征性影像学表现,术前易误诊为肾癌,造成不必要的肾切除,我们在临床中诊治1例,误诊为肾盂肿瘤,现 Renal inflammatory pseudotumor is clinically uncommon and is now referred to as inflammatory myofibroblastoma, which is defined by the new WHO standard as being composed of differentiated myofibroblastic spindle cells, often accompanied by numerous plasma cells and (or ) A tumor of lymphocytes. Because of its lack of characteristic imaging findings, preoperative misdiagnosis of kidney cancer, resulting in unnecessary nephrectomy, we diagnosed in the clinic in 1 case, misdiagnosed as renal pelvis tumors, and now