MRI在直肠癌术前T分期中的误判分析  

The MRI misjudgment analysis in the preoperative T staging of rectal cancer

作　　者：陈传新[1] 胡春洪[2] 马岩[1] 赵伟志[1] 

机构地区：[1]安徽省马鞍山市中心医院影像中心,安徽马鞍山243000 [2]苏州大学附属第一医院影像中心,江苏苏州215006

出　　处：《中国中西医结合影像学杂志》2013年第6期608-610,共3页Chinese Imaging Journal of Integrated Traditional and Western Medicine

摘　　要：目的:探讨MRI在直肠癌术前T分期中的常见误判原因。方法:选择32例经手术病理证实的直肠癌患者,术前均行MRI检查,MRI序列包括常规T1WI、T2WI及STIR。分析直肠癌患者MRI分期,并对照患者术后病理学分期,评估其一致性。结果:直肠癌的术前MRI分期与术后病理学分期的一致性较好(Kappa=0.64,P<0.001)。MRI术前分期误判率为25%,其中,4例pT2期(病理分期为T2期)过度分期为T3期;3例pT3期(病理分期为T3期)低分期为T2期,1例pT3期过度分期为T4期。结论:在直肠癌MRI术前T分期中,正确认识常见误判原因有利于临床治疗方案的制定。Objective： To analyse the MRI misjudgment reasons in the preoperative staging of rectal cancer. Methods： 32 pa tients with rectal cancer proved surgically and histologically were studied. Each of patients underwent MRI examinations before surgical operation, including conventional MRI sequence T1WI, T2 WI, fast gradient echo and fat suppression. According to the MRI analysis standard,consistency was evaluated between reoperative magnetic resonance imaging （MRI） for T staging of rec tal cancer and postoperative pathology. Results：Preoperative magnetic resonance imaging （MRI） for T staging of rectal cancer was good consistency with postoperative pathology（Kappa= 0. 64, P〈0. 001）. MRI misjudgment rate was 25 % in the preoperative staging of rectal cancer. According to our criteria, 4 cases pT2 carcinoma were overstaged as T3 ; 3 case pT3 tumor was understaged as T3; 1 case pT3 was overstagecl as T4. Conclusion： In the preoperative T staging of rectal cancer, knowing MRI misjudgment reasons is helpful to guide clinical proper treatment plan.

关 键 词：直肠癌 磁共振成像 分期 

分 类 号：R445.2[医药卫生—影像医学与核医学] R735.37[医药卫生—诊断学]