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中华医学超声杂志(电子版) ›› 2015, Vol. 12 ›› Issue (03) : 211 -217. doi: 10.3877/cma.j.issn.1672-6448.2015.03.009

所属专题: 妇产科超声影像学 文献

腹部超声影像学

直肠腔内超声弹性成像在直肠腺瘤恶变诊断中的价值
仲光熙1, 吕珂1, 戴晴1, 李建初1, 姜玉新1,()   
  1. 1. 100730 中国医学科学院 北京协和医学院 北京协和医院超声医学科
  • 收稿日期:2015-01-22 出版日期:2015-03-01
  • 通信作者: 姜玉新

The value of endorectal elastography in the diagnosis of malignant rectal adenoma

Guangxi Zhong1, Ke Lyu1, Qing Dai1, Jianchu Li1, Yuxin Jiang1,()   

  1. 1. Department of Ultrasonography, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, China
  • Received:2015-01-22 Published:2015-03-01
  • Corresponding author: Yuxin Jiang
  • About author:
    Corresponding author: Jiang Yuxin, Email:
引用本文:

仲光熙, 吕珂, 戴晴, 李建初, 姜玉新. 直肠腔内超声弹性成像在直肠腺瘤恶变诊断中的价值[J]. 中华医学超声杂志(电子版), 2015, 12(03): 211-217.

Guangxi Zhong, Ke Lyu, Qing Dai, Jianchu Li, Yuxin Jiang. The value of endorectal elastography in the diagnosis of malignant rectal adenoma[J]. Chinese Journal of Medical Ultrasound (Electronic Edition), 2015, 12(03): 211-217.

目的

探讨直肠腔内弹性成像对直肠腺瘤恶变的诊断价值。

方法

2011年1月至2013年5月,选取北京协和医院基本外科诊治的直肠腺瘤患者60例,均在术前行直肠腔内弹性成像弹性分级法(ES)及应变比值(SR)检查。计算组内相关系数(ICC)评估SR多次测量的重复性。对照手术病理结果,评估弹性分级法、应变比值的诊断价值。

结果

60例直肠腺瘤中良性腺瘤20例,腺瘤恶变(直肠腺癌)40例。常规ERUS判断腺瘤恶变的敏感度、特异度、准确性、阳性预测值、阴性预测值分别为68%(27/40)、40%(8/20)、58%(35/60)、69%(27/39)、38%(8/21)。弹性分级法诊断腺瘤恶变的敏感度、特异度、准确性、阳性预测值、阴性预测值分别为85%(34/40)、70%(14/20)、80%(48/60)、85%(34/40)、70%(14/20)。SR测量中,直肠腺癌SR高于良性腺瘤SR(2.82±1.81 vs 1.23±0.57),且两者差异有统计学意义(t=3.333,P<0.05)。单纯良性腺瘤和良性瘤伴重度不典型增生的SR分别与完全恶变病灶的SR相比较(1.26±0.84 vs 2.94±1.95;1.42±0.55 vs 2.94±1.95),差异均有统计学意义(t=2.619,P=0.013;t=2.415,P=0.021)。以1.240为最佳诊断临界点,SR判断直肠腺瘤恶变的敏感度、特异度、准确性、阳性预测值、阴性预测值分别为82%(33/40)、75%(15/20)、80%(48/60)、87%(33/38)、68%(15/22)。

结论

直肠腔内弹性成像可以较准确地诊断直肠腺瘤恶变,为临床手术方式选择提供可靠的术前影像学依据。

Objective

To assess the value of endorectal elastography in the diagnosis of malignant rectal adenoma.

Methods

Sixty patients referred to the department of basic surgery of Peking Union Medical College Hospital for the evaluation of rectal adenoma from January 2011 to May 2013 were included in this prospective cohort. All patients underwent elasticity score (ES) and strain ratio(SR)examine before operation. To evaluate the reproducibility of the strain-ratio measurements, the intraclass correlation coefficient (ICC) was calculated. Compared with final operational pathological results, the diagnostic values of elasticity score and strain ratio method were assessed.

Results

Histopathological result showed there were 20 adenomas and 40 adenocarcinomas. The sensitivity, specificity, accuracy, positive predictive value and negative predictive value of ERUS was 68% (27/40), 40% (8/20), 58% (35/60), 69% (27/39), 38% (8/21), respectively. The sensitivity, specificity, accuracy, positive predictive value and negative predictive value of elasticity score was 85% (34/40), 70% (14/20), 80% (48/60), 85% (34/40), 70% (14/20), respectively. The SR of adenocarcinomas was significantly higher than that of adenomas(2.82±1.81 vs 1.23±0.57, t=3.333, P<0.05). The differences among the SR of benign adenoma, benign adenoma with severe atypical hyperplasia and completely malignant lesions were statistically significant (1.26±0.84 vs 2.94±1.95, 1.42±0.55 vs 2.94±1.95, t=2.619, 2.415, P=0.013, 0.021). When 1.240 was chosen as the best cut-off value of SR, the sensitivity, specificity, accuracy, positive predictive value and negative predictive value of strain ratio was 82% (33/40), 75% (15/20), 80% (48/60), 87% (33/38), 68% (15/22), respectively.

Conclusion

Endorectal elasotgraphy can accurately diagnose the malignant rectal adenoma, which can provide reliable preoperative imaging evidence for clinical operation mode.

图6 灰阶超声与弹性成像图双幅显示,左侧弹性成像图显示腺瘤内部散在位置相对固定的局限性蓝色区域,在右侧灰阶超声图像上勾画腺瘤病灶区域(A),正常肠壁组织区域(B),获得应变比值为2.03
表1 60例患者病理组织类型
表2 良性腺瘤与直肠腺癌患者的一般情况比较
表3 常规直肠腔内超声诊断直肠腺瘤恶变与病理结果对比
表4 直肠腔内弹性成像弹性分级法诊断直肠腺瘤恶变与病理结果对比
图7 以直肠腺癌患者肠腔内特性成像应变比值绘制受试者操作特性曲线,曲线下面积为0.850
表5 直肠腺癌患者直肠腔内不同弹性成像应变比值的敏感度、特异度及准确性(%)
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