肾嗜酸细胞腺瘤的MRI表现  

Renal Oncocytoma: MR Imaging Analysis

作　　者：孟鑫[1,2] 叶慧义[2] 王海屹[2] 袁静[3] 王鑫坤[2] 唐业欢[2] 马鑫[4] 

机构地区：[1]齐齐哈尔医学院附属第三医院磁共振科,黑龙江齐齐哈尔161002 [2]解放军总医院放射诊断科,北京100853 [3]解放军总医院病理科,北京100853 [4]解放军总医院泌尿外科,北京100853

出　　处：《中国医学影像学杂志》2013年第8期586-589,共4页Chinese Journal of Medical Imaging

基　　金：解放军总医院科技创新苗圃基金项目面上项目(11KMM38)

摘　　要：目的探讨肾嗜酸细胞腺瘤(RO)的MRI表现。资料与方法回顾性分析11例经手术病理证实的RO患者的MRI平扫和多时相动态增强扫描表现。结果 11例术前均误诊为肾癌。9例呈不均匀稍长T2信号,2例呈稍长T2信号;11例呈等或稍长T1信号。病灶内有明显瘢痕2例,出血2例,囊变坏死5例,含脂质3例,假包膜7例;8例行扩散加权成像检查,均呈稍高信号,平均ADC值为(1.655±0.275)×10-3mm2/s;动态增强扫描显示富血供病灶8例,乏血供病灶3例。结论 RO术前诊断困难,但当病灶内部有明确纤维瘢痕时,应考虑RO的可能性。Purpose To analyze MRI findings of renal oncocytoma （RO）. Materials and Methods The findings in plain and multi-phase dynamic contrast-enhanced MR scans of 11 patients with RO confirmed pathologically by surgery were retrospective analyzed. Results All 11 cases were misdiagnosed as renal carcinoma before surgery 9 cases were with heterogeneous slightly long T2 signal and 2 with slightly long T2 signal; l l cases showed iso- or slightly long TI signal. 2 cases were with clear scars, 2 cases with hemorrhage, 5 cases with cystic necrosis, 3 cases containing lipid, 7 cases of pseudocapsule; 8 patients underwent DWI examination, all were slightly hyperintense with mean ADC value of （1.655±0.275）× 104 mm2/s; dynamic contrast-enhanced scan showed 8 hypervascular lesions, 3 hypovascular lesions. Conclusion It may be difficult to diagnose RO before surgery： however, RO can be considered when internal fibrous scar is presented

关 键 词：肾肿瘤 腺瘤 嗜酸性 磁共振成像 

分 类 号：R737.11[医药卫生—肿瘤]