肾脏嗜酸细胞腺瘤影像学分析  

The imaging analysis of renal oncocytoma

作　　者：满术千[1] 张学勇[1] 李旭丹[1] 王明杰[1] 

机构地区：[1]浙江省丽水市人民医院放射科,浙江丽水323000

出　　处：《医学影像学杂志》2015年第2期289-292,共4页Journal of Medical Imaging

摘　　要：目的探讨肾脏嗜酸细胞腺瘤的影像学表现,提高对肾脏嗜酸性细胞瘤的影像诊断水平。方法回顾性分析本院经手术病理证实的16例肾脏嗜酸细胞腺瘤的影像学表现,并与手术病理进行对比分析。结果 CT平扫病灶多呈等密度,个别肿瘤边缘可见钙化,CT增强扫描9例为均匀强化,7例为不均匀强化,其中8例在增强扫描皮髓期表现病灶中央星状瘢痕;平扫T1WI病灶呈等低信号,其中8例中央裂隙状疤痕呈更低信号,T2WI病灶呈等或高低混杂信号,中央疤痕呈裂隙状高信号,MR增强扫描9例明显均匀强化,7例不均匀强化,但肿瘤实质部分强化均匀,中央疤痕无强化,或延迟强化。结论肾脏嗜酸细胞腺瘤是一种良性肿瘤,位于肾皮质区,可向肾外突出,边界清楚。平扫肿瘤呈等密度或信号,增强扫描肿瘤实性部分均匀强化,中央出现星状疤痕以及肿瘤内"轮辐状"强化是其特征性影像表现。Objective To discuss the renal oncocytoma imaging performance and to improve the diagnostic level of renal oncocytoma.Methods 16 cases of renal oncocytoma imaging confirmed by operation and pathology were analysized retrospectively,and the results were compared with surgery and pathology.Results CT scan in all lesions showed isodense,individual tumor with calcification on the edge,enhanced CT scan in 9 cases showed homogeneous enhancement,7 cases presented with heterogeneous enhancement,8 cases were shown central stellate scar in the corticomedullary phase enhanced scanning.MR scan for the leisions showed hypoisointense on T1 WI,isointense or hypo-hyperintense on T2 WI,with central slit shaped scar more hypointense on T1 WI and hyperintense on T2 WI in 8 cases.MR enhancement scan for the leisions showed homogeneous enhancement in 9 cases,inhomogeneous enhancement in 7 cases,but the solid part of the tumors was shown homogeneously enhancement,central scar without enhancement or delayed enhancement.ConclusionRenal oncocytoma a benign tumor located in the renal cortex,may highlight to the kidney,clear boundary.Nonenhanced tumor showed isodense or isointense,homogeneous enhancement in solid parts of tumor,central stellate scar and ＂shaped＂ enhancement within tumor are characteristic imaging findings.

关 键 词：肾肿瘤 腺瘤 嗜酸性 体层摄影术 X线计算机 磁共振成像 

分 类 号：R737.11[医药卫生—肿瘤] R814.42[医药卫生—临床医学]