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Abstract
Recent studies have shown that multiparametric magnetic resonance imaging and magnetic resonance imaging-guided prostate biopsy in patients with suspected prostate cancer increase detection rate and clinical significance of diagnosed tumors. Purpose of this study is to evaluate the detection rates of prostate cancer for magnetic resonance imaging-guided prostate biopsy related to Prostate Imaging Reporting and Data System score. We included all patients with cancer-suspicious lesions on 3-Tesla multiparametric magnetic resonance imaging-prostate who underwent magnetic resonance imaging-guided prostate biopsy in Haga Teaching Hospital between January 2013 and January 2015. In total, 155 patients were included. In 100 of 155 (65%) men, MRI-guided prostate biopsy was positive for prostate cancer. No biopsy of PI-RADS 2-lesions was positive. PI-RADS 3- and 4-lesions were, respectively, in 10 and 77% prostate cancer positive. Biopsies of PI-RADS 5-lesions were in 89% of the cases positive. The majority of detected cancers (63%) were Gleason score ≥7, and this number increases to 75% in positive PI-RADS 5-lesions. Magnetic resonance imaging-guided prostate biopsy has a high detection rate of prostate cancer in men with cancer-suspicious lesions on multiparametric magnetic resonance imaging-prostate, and this rate (65%) increases with the Prostate Imaging Reporting and Data System score (81% in PI-RADS 4- and 5-lesions).
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