MRI 平扫结合 DWI 在宫颈癌临床分期中的应用价值

目的：探讨 MRI 平扫结合扩散加权成像（diffusion weighted imaging，DWI）在宫颈癌分期中的准确性。方法：术后病理证实宫颈癌患者35例，术前行 MRI 平扫及 DWI 检查；以术后病理为金标准，比较 DWI 结合MRI 平扫与 MRI 平扫在宫颈癌总体分期准确性、各期别分期准确性方面的差异。结果：DWI 结合 MRI 平扫总体准确分期32例，分期准确性91.4%；MRI 平扫总体准确分期24例，分期准确性68.6%，两者比较具有统计学差异。两种方法对宫颈癌Ⅰb 期（10例）、Ⅱa 期（24例）分期的评判中，DWI 结合 MRI 平扫准确分期分别为9例、22例，分期准确性分别为90%、91.7%；MRI 平扫准确分期分别为8例、15例，分期准确性分别为80%、62.5%；两种方法对宫颈癌Ⅱa 期分期准确性有统计学差异，对Ⅰb 期分期准确性无统计学差异。结论：MRI 平扫结合 DWI 在宫颈癌分期中具有重要价值。

Value of MR imaging in staging of uterine cervical cancer:A comparison of plain MR scan and DW imaging

Objective:To investigate the accuracy of plain MR scan combined with diffusion weighted imaging (DWI)in staging of uterine cervical cancer(UCC). Methods:Retrospectively analyzed the staging from 35 UCC pa-tients. All cases were confirmed by pathology in the following operation and examined with MR(plain MR scan and DWI)before operation. All patients were divided into two groups based on whether to accept DWI scan. The accuracy of staging were compared. Results:DWI combined with plain MR scan accurate staging in 32 cases,the accuracy was 91. 4% . Plain MR scan accurate staging in 24 cases,the accuracy 68. 6% . The difference was statistically significant. In stageⅠa andⅡb ,DWI combined with plain MR scan were 9 cases and 22 cases respectively. Staging accuracy was 90% and 91. 7% . The plain MR scan were 8 cases and 15 cases respectively. Staging accuracy was 80 % and 62. 5% . The accuracy of the two methods of UCC in stageⅡa stage was statistically different,and there was no signifi-cant difference in the accuracy of Ⅰb staging. Conclusion:DWI combined with plain MR scan has value in staging of cervical cancer.