【摘要】 目的 探讨肾嗜酸性细胞腺瘤的CT及MR表现,以提高对该病的认识及影像诊断水平。方法 回顾性分析12例经手术病理证实的肾嗜酸性细胞腺瘤的CT及MR表现。结果 CT检查12例（1例伴发对侧肾血管平滑肌脂肪瘤）,7例位于右肾,5例位于左肾,肿瘤呈圆形或类圆形,直径1.5～12.3 cm不等。平扫显示密度均匀3例,2例显示病灶内点状钙化,5例显示病灶内星状瘢痕组织。增强扫描皮质期所有病例均显示肿瘤实质明显强化,肾实质期呈进一步强化,部分病例实质期强化程度减低。中央瘢痕延迟强化3例。7例同时行MR检查,其中4例T₁WI呈低信号,5例T2WI呈混杂高信号,MR动态增强扫描,1例呈明显均匀强化,其余呈不均匀强化,中央瘢痕大部分延迟强化。结论 肾嗜酸性细胞腺瘤CT及MR表现有一定的特征性,有助于术前正确诊断及指导治疗。更多还原

【Abstract】 Objective To evaluate the CT and MR features of renal oncocytoma in order to improve the ability for recognition and imagingdiagnosis.Methods The CT and MR findings of renal oncocytoma in 12 patients proved by pathology were retrospectively analyzed.Results CT scans were performed in 12 patients,one of which was accompanied with the contralateral renal angiomyoliptoma.In all lesions.seven were in the right kidney and five in the left.The lesions were round or oval in shape with the diameter 1.5 cm-12.3 cm.On pre-contrast scan,the homogeneous density was found in 3,calcification in 2,and central scar tissue in 5.On post-contrast images,the parenchyma of tumor was obviously enhanced in the cortical phase.However,the enhancement was attenuated in the parenchymal phase.Seven patients underwent MRI at the same time,exhibiting iso-or hypointensity on T₁WI in 4 and heterogenous hyperintensity on T₂ WI in 5.Dynamic contrast enhanced MRI demonstrated homogenous enhancement in 1 and heterogenous enhancement in others with delayed enhancement of the central scar.Conclusion Most renal oncocytomas show certain characteristics on CT or MRI,which are helpful for preoperative diagnosis and surgical therapy.更多还原