核磁共振与腔内超声对直肠癌术前局部分期的价值比较

Comparative study of endoluminal ultrasonography and magnetic resonance imaging in preoperative staging of rectal carcinoma

目的比较核磁共振（MRI）和腔内超声（EUS）对直肠癌术前分期的价值。方法分别应用MRI和EUS检查对72例和55例直肠癌患者行术前分期，与手术及病理结果对比，比较MRI和EUS对直肠肿瘤浸润深度、区域淋巴结转移判断的准确性。结果MRI判断T分期总的准确率为76．4％（55／72），MRI评价N分期的准确率为63．9％（46／72），EUS判断T分期总的准确率为81．8％（45／55），评价N分期的准确率为65．5％（36／55）。结论MRI与EUS判断T分期的准确性差异无统计学意义，EUS判断早中期直肠肿瘤浸润层次的准确率高于MRI，两者判断N分期的准确率均较低。

Objective To comparative study of endoluminal ultrasonography （EUS） and magnetic resonance imaging （MRI） in reoperative staging of rectal carcinoma. Methods MRI and EUS was performed prior to surgery in 58 patients with rectal carcinoma to assess its value in staging the tumor. Results The accuracy of MRI for T staging and N staging were 76.4% and 63.9%. The accuracy of EUS for T staging and N staging were 81.8% and 65.5%. Conclusion EUS is superior to MRI in judgment for early tumors infiltrate depth. But both have certain limitations in detection of N staging.