目的：分析肾嗜酸细胞瘤的ＣＴ表现及其病理基础，以提高对此瘤的认识。材料与方法：２例肾嗜酸细胞瘤经病理诊断，术前均行ＣＴ平扫及增强扫描。结果：２例均为单发肿瘤，直径分别为４．８ｃｍ及５．０ｃｍ。ＣＴ特点为：（１）肿块密度多较均匀，无出血、坏死；（２）肿块中心见低密度疤痕；（３）有完整的肿瘤包膜。肿瘤的这些ＣＴ表现与病理改变大体一致。结论：当ＣＴ显示密度较均匀的肿块伴有中心低密度疤痕及完整肿瘤包膜时可提示肾嗜酸细胞瘤。 OBJECTIVE: To analyze the CT manifestations of renal oncocytoma and its pathological basis to improve the understanding of this tumor. MATERIALS AND METHODS: Two cases of renal oncocytomas were diagnosed by pathology. CT scan and enhanced scan were performed before operation. Results: Both of them were single tumors with diameters of 4.8cm and 5.0cm respectively. CT features are: (1) more uniform mass density, no bleeding, necrosis; (2) low density scar in the center of the tumor; (3) a complete tumor capsule. These CT findings of tumors are generally consistent with pathological changes. CONCLUSIONS: Renal oncocytoma can be suggested when CT shows a more uniform mass with a central low-density scar and an intact tumor envelope.