MRI常规序列结合DWI对盆腔内结直肠癌术前临床分期的价值

目的 :探讨MRI常规序列结合DWI对盆腔内结直肠癌术前T-N分期的价值。方法 :53例经病理证实结直肠癌患者,术前对其行MRI常规序列及DWI检查。并根据AJCC 2010版癌症分期手册制订影像学分期标准,进行术前T分期和局部N分期,与术后病理T分期(pathological T stages,p T)和局部的N分期(pathological N stages,p N)比较。结果:MRI对p T1~2期的诊断准确率88.7%,p T3期83.0%,p T4期94.3%,对T分期总诊断准确率83.0%,与病理分期一致性好(K=0.582,P0.01)。MRI对N分期诊断准确率81.1%,特异性89.2%,敏感性62.5%,阳性预测值71.4%,阴性预测值84.6%,与病理分期一致性好(K=0.536,P0.001)。结论:MRI常规序列结合DWI对盆腔内结直肠癌术前T-N分期具有重要价值。

Study of DWI combined with conventional MRI sequence in pre-surgical staging of colorectal cancer