CAJ | 학술논문

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 T1 WI 呈低信号,5例 T2 WI 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。
목적：탐토신기산성세포선류적 CT 급 MR 표현,이제고대해병적인식급영상진단수평。방법회고성분석12례경수술병리증실적신기산성세포선류적 CT 급 MR 표현。결과 CT 검사12례(1례반발대측신혈관평활기지방류),7례위우우신,5례위우좌신,종류정원형혹류원형,직경1.5~12.3 cm 불등。평소현시밀도균균3례,2례현시병조내점상개화,5례현시병조내성상반흔조직。증강소묘피질기소유병례균현시종류실질명현강화,신실질기정진일보강화,부분병례실질기강화정도감저。중앙반흔연지강화3례。7례동시행 MR 검사,기중4례 T1 WI 정저신호,5례 T2 WI 정혼잡고신호,MR 동태증강소묘,1례정명현균균강화,기여정불균균강화,중앙반흔대부분연지강화。결론신기산성세포선류 CT 급 MR 표현유일정적특정성,유조우술전정학진단급지도치료。
Objective To evaluate the CT and MR features of renal oncocytoma in order to improve the ability for recognition and ima-gingdiagnosis.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 T1 WI 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.