MRI对前列腺癌的诊断与分期

目的：探讨高场强MRI在前列腺癌的诊断和分期中的作用。方法：回顾性分析经手术病理证实的26例前列腺癌的高场强MRI资料,并与病理结果和临床分期对照。结果：26例前列腺癌中MRI诊断前列腺炎2例,前列腺增生4例,前列腺癌20例,其中B期5例,C期13例,D期2例,定性诊断符合率为76.9%,20例前列腺癌分期符合率为85%;典型的前列腺癌在T1像呈稍低信号,与正常前列腺组织接近,在T2像上表现为正常较高信号的周围带内出现异常低信号灶,增强扫描多数早期较明显强化。结论：高场强MRI对前列腺癌诊断与分期有重要价值。

Diagnosis and Staging of Prostatic Cancer with MRI

Objective：To investigate the value of high field MRI in the diagnosis and staging of prostatic cancer. Methods： High field MRI findings of 26 cases with surgery and pathology proven prostatic cancer were retrospectively analyzed and correlated with pathology and tumor staging. Results： The MRI diagnosis of these 26 cases were prostatitis （2 cases）, benign prostate hyperplasia （4 cases） , prostatic cancer （20 cases）. The staging of these 20 cases which MRI diagnosed as prostatic cancer were stage B （5 cases）,stage C （13 cases） and stage D （2 cases）. The accuracy of MRI in the diagnosis of prostatic cancer was 76.9% （20/26） and for staging was 85%. Typical MRI features of prostatic cancer were low signal intensity on T1WI close to that of normal prostate tissue,abnormal low signal intensity area within the normal high signal intensed peripheral zone on T2 WI, early and marked enhancement after contrast administration. Conclusion： High field MRI shows significant value in the diagnosis and staging of prostate cancer.