MRI、经直肠超声评估直肠癌术前T分期的准确性研究

Accuracy of MRI and Transrectal Ultrasound in Assessing Preoperative T Staging of Rectal Cancer

目的对比MRI、经直肠超声评估直肠癌术前T分期的准确性。方法收集本院2018年1月至2019年1月诊治的63例直肠癌患者的影像学资料,患者均行MRI及经直肠超声检查,以病理学检查结果为“金标准”,计算不同检查对直肠癌术前T分期的诊断符合率。结果以病理结果为参照,MRI检查对63例直肠癌患者术前T分期诊断总符合率为92.06%(58/63),与病理学结果相比,两者无统计学意义(P>0.05),其中T_(1)、T_(2)、T_(3)、T_(4)分期诊断符合率依次为92.30%(12/13)、96.55%(28/29)、85.71%(12/14)、85.71%(6/7)。经直肠超声检查对63例直肠癌患者术前T分期诊断总符合率为84.12%(53/63),与MRI结果相比,经直肠超声检查对直肠癌术前T分期诊断总符合率较低(P<0.05),T_(1)、T_(2)、T_(3)、T_(4)分期诊断符合率依次为76.92%(10/13)、93.10%(27/29)、78.57%(11/14)、71.42%(5/7)。结论MRI、经直肠超声均可有效显示直肠癌图像特征,MRI多序列扫描检查评估直肠癌术前T分期准确性优于经直肠超声。

Objective To compare the accuracy of MRI and transrectal ultrasound in assessing preoperative T staging of rectal cancer.Methods The imaging data of 63 patients with rectal cancer diagnosed and treated in our hospital from January 2018 to January 2019 were collected.All patients underwent MRI and transrectal ultrasonography.The results of pathological examination were used as the gold standard.The diagnostic accuracy of different examination for preoperative T staging of rectal cancer was calculated.Results The pathological results were used as a reference.The total accuracy of MRI in diagnosis of the preoperative T staging of 63 patients with rectal cancer was 92.06%(58/63).There was no significant difference between the MRI and pathological results(P>0.05).Among them,the accuracy of MRI in diagnosis of the preoperative T_(1) staging,T_(2) staging,T_(3) staging and T_(4) staging was 92.30%(12/13),96.55%(28/29),85.71%(12/14),and 85.71%(6/7)respectively.The total accuracy of transrectal ultrasound in diagnosis of the preoperative T staging of rectal cancer was 84.12%(53/63).Compared with the MRI results,the total accuracy of transrectal ultrasound in diagnosis of the preoperative T staging was lower(P<0.05).And the accuracy of transrectal ultrasound in diagnosis of the preoperative T_(1) staging,T_(2) staging,T_(3) staging,and T_(4) staging was 76.92%(10/13),93.10%(27/29),78.57%(11/14),and 71.42%(5/7),respectively.Conclusion Both MRI and transrectal ultrasound can effectively display the image characteristics of rectal cancer.Multi-sequence scans of MRI are more accurate in assessing the T stage of rectal cancer than transrectal ultrasound.