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中华腔镜泌尿外科杂志(电子版) ›› 2017, Vol. 11 ›› Issue (05) : 338 -343. doi: 10.3877/cma.j.issn.1674-3253.2017.05.012

所属专题: 文献

临床研究

乏脂肪肾血管平滑肌脂肪瘤与肾透明细胞癌的CT鉴别诊断
张亚琴1, 朱俊颖2, 侯永和3, 方友强4,()   
  1. 1. 519000 珠海,中山大学附属第五医院放射科
    2. 510630 广州,中山大学附属第三医院放射科
    3. 510530 广州视源健康管理中心
    4. 510630 广州,中山大学附属第三医院泌尿外科
  • 收稿日期:2017-07-18 出版日期:2017-10-01
  • 通信作者: 方友强
  • 基金资助:
    珠海市医疗卫生科技计划项目(20171009E030011); 广州市科技计划项目产学研协同创新重大专项(201704020052)

CT differential diagnosis of fat-poor angiomyolipoma and clear cell renal carcinoma

Yaqin Zhang1, Junying Zhu2, Yonghe Hou3, Youqiang Fang4,()   

  1. 1. Department of Radiology, the Fifth Affiliated Hospital of Sun Yat-sen University, Zhuhai 519000, China
    2. Departmentof Radiology, the Third Affiliated Hospital of Sun yat-sen University Guang zhou 510630, China
    3. Guangzhou Shiyuan Health Management Center, Guangzhou 510530, China
    4. Department of Urology, the Third Affiliated Hospital of Sun yat-sen University Guang zhou 510630, China
  • Received:2017-07-18 Published:2017-10-01
  • Corresponding author: Youqiang Fang
  • About author:
    Corresponding author: Fang Youqiang, Email:
引用本文:

张亚琴, 朱俊颖, 侯永和, 方友强. 乏脂肪肾血管平滑肌脂肪瘤与肾透明细胞癌的CT鉴别诊断[J]. 中华腔镜泌尿外科杂志(电子版), 2017, 11(05): 338-343.

Yaqin Zhang, Junying Zhu, Yonghe Hou, Youqiang Fang. CT differential diagnosis of fat-poor angiomyolipoma and clear cell renal carcinoma[J]. Chinese Journal of Endourology(Electronic Edition), 2017, 11(05): 338-343.

目的

探讨CT平扫及动态增强扫描在肾血管平滑肌脂肪瘤与肾透明细胞癌鉴别诊断中的临床应用价值。

方法

回顾性搜集CT误诊为肾癌的肾血管平滑肌脂肪瘤(AML)16例及肾透明细胞癌(ccRCC)30例患者的CT平扫及动态增强扫描资料,由2名影像医师分别独立评价肿瘤形态特征如有无钙化、假包膜、劈裂征、喙征;测量乏脂肪肾血管平滑肌脂肪瘤(fpAML)和(ccRCC) CT平扫及增强扫描各期的CT值、计算强化指数,进行独立样本t检验。

结果

平扫fpAML肿瘤CT值为(44±9)Hu,ccRCC平扫CT值为(31±4)Hu,差异有统计学意义(P<0.05),增强扫描各期CT值两者间差异无统计学意义(P>0.05)。fpAML与ccRCC皮质期、实质期、排泄期强化指数比较,差异有统计学意义(P<0.05)。实质期fpAML75%强化较为均匀一致,而ccRCC组93.3%表现为强化不均匀。

结论

fpAML平扫CT值明显高于ccRCC,增强扫描fpAML在皮质期、实质期和排泄期强化程度均低于ccRCC,实质期fpAML强化较为均匀一致,ccRCC强化不均匀。这三点是fpAML与ccRCC重要的CT鉴别诊断要点。

Objective

To evaluate the clinical value of CT plain scan and dynamic contrast enhanced scan in the differential diagnosis of renal angiomyolipoma and renal clear cell carcinoma.

Methods

CT scan and dynamic enhancement scan data were collected from 30 patients with renal clear cell carcinoma (ccRCC) and 16 cases of renal angiomyolipoma which were misdiagnosed as RCC. Two radiologists retrospectively evaluated the morphological features (i.e. split sign, beak sign, with or without pseudocapsule and calcification) and enhancement features (i.e.CT value of ROI in each phase, the enhancement index of each phase. For the parameters that had statisticall differences between the two groups, we calculated the P values by using the independent sample t test.

Results

The CT value of fpAML tumor was (44±9) Hu, and the CT value of renal clear cell carcinoma was (31±4) Hu (P<0.05).The enhancement index of fpAML was less than ccRCC in cortical phase, nephrographic phase and excretory phase(P<0.05). In nephrographic phase,75% of fpAML showed a homogeneous enhancement, while 93.3% of ccRCC showed heterogeneous enhancement.

Conclusion

In this study, we confirmed common imaging features of fpAML are different with ccRCC:higher attenuation on unenhanced CT sequences; less enhancement on enhanced phases, more uniform enhancement in nephrographic phase.

表1 肾透明细胞癌(ccRCC)和乏脂肪肾血管平滑肌脂肪瘤(fpAML)两组患者一般情况及肿瘤的总体特征
图4~6 右肾上极的透明细胞癌图4 CT平扫,肿块为稍低密度,CT值为25.5 Hu图5 CT增强扫描皮质期,肿瘤明显不均匀强化图6 增强扫描实质期,肿瘤强化较皮质期明显减退,强化仍不均匀
表2 肾透明细胞癌和乏脂肪肾血管平滑肌脂肪瘤平扫及增强各期CT值及强化指数比较
图9 乏脂肪肾血管平滑肌脂肪瘤,可见少许散在脂肪组织、大量的平滑肌组织和厚壁血管(HE染色,×100)
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