前列腺影像报告与数据系统对前列腺特异性抗原灰区前列腺癌的诊断价值

摘要

Objective To access the diagnostic value of Prostate Imaging Reporting and Data System (PIRADS version 2)for prostate cancer (PCa) in prostate specific antigen (PSA) grey zone(4-10 ng/mL).Methods Treatment naive PCa and BPH patients with an increase of PSA 4-10 ng/mL from 2200 patients underwent prostate MRI from 2012 to 2016 were included,multiparameter magnetic resonance imaging (mp-MRI) prior biopsy or prostatectomy and clinical data were obtained,mp-MRI were retrospectively analyzed quantitatively by a radiology expert with 15 years experience in urogenital system imaging diagnosis and a doctor with 5 years experience in radiology diagnosis blind to the pathology results according to PIRADS v2,PIRADS v2 score and lesion zone were recorded respectively,in case of disagreement,dicision was made through discuss.TRUS guided biopsy or prostatectomy pathology serves as gold reference.Diagnostic value of PIRADS v2 for PSA grey zone PCa was calculated by receiver operating characteristic (ROC) curve,logistic regression analysis was used to access the risk factors of PCa.Results 15 PCa and 30 BPH patients were in eluded.There was no significant difference between these two groups in age,tPSA,fPSA,f/tPSA,prostate volume and PSA density.The area under ROC curve of PIRADS v2 in diagnosing PCa was 0.932[95 ％ CI 0.822-0.984],P＜0.01.Using a cutoff PIRADS＞4,the diagnosis sensitivity was 88.89 ％,specificity 87.10 ％,and positive predictive value 80 ％,negative predictive value 93.10％,respectively.Logistic regression analysis showed that PIRADS v2 score was an independent risk factor for predicting PCa,with a hazard ratio 17.847[3.745-85.078],P＜0.01.There was a positive correlation between PIRADS v2score and gleason score,r=0.585,P=0.022.Conclusion PIRADS v2 has a significantly high diagnosis value in diagnosing PSA grey zone PCa and a good correlation with pathology results.%目的 评估前列腺影像报告与数据系统(PIRADS v2)对前列腺特异性抗原(PSA)灰区前列腺癌(PCa)的诊断价值.方法 纳入2012-2016年总共2 200例行前列腺磁共振成像(MRI)检查病例中PSA为4～10 ng/mL,穿刺活检或手术切除前行多参数MRI(mp-MRI)检查,未接受任何形式治疗的PCa及前列腺增生(BPH)患者,收集mp-MRI图像及临床资料,回顾性分析其mp-MRI,根据PIRADS v2对所有病灶定量评分,记录PIRADS v2分值及病灶所在区域.以经直肠超声(TRUS)引导穿刺活检或手术切除标本病理结果为金标准.运用ROC曲线计算PIRADS v2诊断PSA灰区PCa的诊断价值,Logistic回归分析前列腺癌的危险因素.结果 共纳入15例PCa患者和30例BPH患者,两组患者在年龄、tPSA、fPSA、f/tPSA、前列腺体积、PSA密度(PSAD)差异均无统计学意义(P＞0.05).PIRADS v2诊断PCa的曲线下面积(AUC) =0.932(95％CI 0.822～0.984),P＜0.01;最佳切点为PIRADS v2≥4分,诊断敏感性为88.89％,特异性为87.10％,阳性预测值为80.00％,阴性预测值为93.10％.Logistic回归显示,PIRADS v2评分是PCa的独立预测因子,Hazard Ratio(HR)=17.847 (3.745～85.078),P＜0.01.PIRADSv2评分与病理Gleason评分呈正相关(r=0.585,P=0.022).结论 PIRADS v2评分对PSA灰区PCa具有较高的诊断价值,且与病理结果具有相关性.