T2WI积分法对前列腺移行区癌诊断及鉴别诊断的价值

目的 探讨T2WI积分法对移行区前列腺癌(PCa)诊断及鉴别诊断的价值.方法 回顾性分析经病理证实的43例移行区PCa和91例前列腺增生(BPH)患者的T2WI图像,将T2WI影像征象分为主要征象和次要征象,并赋予不同积分,通过受试者工作特征(ROC)曲线评价不同积分对其诊断价值.结果 在-1~10共11个积分段中,移行区PCa的敏感度随着积分的增加而降低,特异度和阳性预测值逐渐增高.依据ROC曲线,积分≥4.5时为最佳诊断值,其敏感度为81%,特异度为73.3%,阴性预测值为90.9%,准确度为70.4%;积分≥8.5时,特异度和阳性预测值均为100%;在积分≥0.5和≥1.5时,阴性预测值均为100%.结论 T2WI积分能对移行区PCa进行量化分析,对提高临床诊断和指导治疗具有重要的价值.

Value of T2WI scores in diagnosis and differential diagnosis of transition zone prostate cancer

Objective To evaluate the value of T2WI scores for diagnosis and differential diagnosis of transition zone prostate cancer(PCa).Methods T2WI of 43 cases of transition zone PCa and 91 cases of benign prostatic hyperplasia(BPH) were analyzed retrospectively.Transition zone T2WI signs were divided into the main signs and the secondary signs, which were given different scores and were evaluated separately by receiver operating characteristic (ROC) curve for their diagnostic value.Results In a total of 11 scores sections (-1-10), as the increase of scores, the sensitivity of transition zone PCa was decreased while the specificity and positive predictive value were both increased.According to the ROC curve, when the critical value of scores≥4.5, the sensitivity, specificity, negative predictive value, and the accuracy were 81%,73.3%,90.9%,70.4% respectively.When the scores ≥8.5,the specificity and positive predictive value were both 100%.When the scores ≥0.5 and ≥1.5,the negative predictive value were 100%.Conclusion T2WI scores can quantitatively analyze the transition zone PCa,which has an important value to improve the clinical diagnosis and guide treatment.