Evaluation of PCA3 and multiparametric MRI’s: collective benefits before deciding initial prostate biopsy for patients with PSA level between 3-10ng/mL

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Vol. 42 (3): 449-455, May – June, 2016

doi: 10.1590/S1677-5538.IBJU.2015.0155


ORIGINAL ARTICLE

Evaluation of PCA3 and multiparametric MRI’s: collective benefits before deciding initial prostate biopsy for patients with PSA level between 3-10ng/mL

Sezgin Okcelik 1, Hasan Soydan 2, Ferhat Ates 2, Ufuk Berber 3, Hasan Saygin 4, Güner Sönmez 4, Kenan Karademir 2
1 Department of Urology, Beytepe Military Hospital, Ankara, Turkey; 2 Department of Urology Haydarpasa Training Hospital, Istanbul, Turkey; 3 Department of Pathology, Corlu Military Hospital, Tekirdag, Turkey; 4 Department of Radiology, Haydarpasa Training Hospital, Istanbul, Turkey

ABSTRACT

Objective: To analyze the contribution of multiparametric MRI and PCA3 assay, pre- decision of initial biopsy in PSA level between 3-10 ng/mL patients with normal digital rectal examination(DRE).
Materials and Methods: PSA level 3-10 ng/mL ,patients, with normal DRE results and no previous prostate biopsy history, were included in this study. Each patient un¬derwent multiparametric MRI one week before biopsy. Urine sample taking for PCA3 examination preceded the biopsy. Systematic and targeted biopsies were conducted.
Patients with high PSA levels were seperated into two groups as: high PCA3 scored and low PCA3 scored. Then each group was divided into two sub-groups as: MRI lesion positive and negative. Tumor incidence, positive predictive values(PPV) and negative predictive values(NPV) were calculated.
Results: 53 patients were included between February 2013 and March 2014.Mean age 61.22 ± 1.06. Mean PSA value 5.13 ± 0.19 ng / mL. Mean PCA3 score 98.01 ± 23.13 and mean prostate size was 48.96 ± 2.67 grams.
Fourty nine patients had both PCA3 score and multiparametric MRI. The PCA3’s PPV value was 58.33%. If multiparametric MRI lesions are added to high PCA3 scores , the PPV appears to elevate to 91.66%.
NPV of PCA3 was 96%. NPV was 95% when there was no lesion in the multiparametric MRI with low PCA3 scores. Sensitivity was 91.66% , specificity was 95% respectively.
Conclusion: Adding multimetric MRI can also support biopsy decision for patients with high PCA3 value. When PCA3 value is low, patients can be survailled without any need to take a MRI.

Keywords: prostate cancer antigen 3, human [Supplementary Concept]; Prostate; Magnetic Resonance Imaging

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