前列腺癌的MRI诊断、分期及与前列腺增生的鉴别

MRI diagnosis and stage of prostatic carcinoma and differentiation with hyperplasia

目的 分析前列腺癌的MRI诊断与分期,探讨癌与增生的鉴别诊断。方法 收集40例前列腺癌和30例前列腺增生的病例,对其治疗前的MRI资料进行分析和比较。结果 前列腺癌75％发生于外周带,T_2WI中央腺体外缘的低信号环影在前列腺癌组中82.5％消失或中断,增生组中80％完整,77.5％的前列腺癌发现时已位于C、D期。结论 T_2WI中央腺体外缘的低信号环影可作为前列腺的解剖标志。

To summarize the diagnosis and stage of proslatic carcinoma in MRI, and evaluate the differentiation diagnosis between carcinoma and hyperplasia. Methods The MRI materials of 40 cases prostate carcinoma and 30 cases hyperplasia were analyzed and compared before and after treatment. Result In carcinoma group, 75% cases occurred in peripheral zone, and the hypointense ring around the central gland disappeared or discontinued in 82. 5% cases; however, in hyperplasia group, 80% the ring kept intact. Conclusion The hypointense ring surounding central on T2WI was a mark of prostate zone anatomy. It's invasion could be helpful to differentiate carcinoma from hyperplasia.