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. 2011 Aug;52(8):572-7.
doi: 10.4111/kju.2011.52.8.572. Epub 2011 Aug 22.

The Clinical Value of Performing an MRI before Prostate Biopsy

Myung Sun Choi  1 , Yong Sun Choi, Byung Il Yoon, Su Jin Kim, Hyuk Jin Cho, Sung Hoo Hong, Ji Youl Lee, Tae-Kon Hwang, Sae Woong Kim
Affiliations

The Clinical Value of Performing an MRI before Prostate Biopsy

Myung Sun Choi et al. Korean J Urol. 2011 Aug.

Abstract

Purpose: Prostate cancer foci have a characteristic feature in magnetic resonance imaging (MRI). We aimed to assess the clinical value of MRI before prostate biopsy in prostate cancer detection.

Materials and methods: From March 2009 to June 2010, 154 patients were enrolled in this study. A total of 51 patients with a clinical suspicion of prostate cancer underwent prostate MRI by a 3T scanner before transrectal ultrasound (TRUS)-guided biopsies. A total of 103 patients with a clinical suspicion of prostate cancer underwent prostate MRI after biopsies. The sensitivity, specificity, and positive predictive value (PPV) were evaluated. In addition, tumor location of pathologic findings and ADC mapping on MRI were matched and compared.

Results: The sensitivity of MRI before and after biopsy was 84.8% and 92.4%, respectively. The PPV of MRI before and after biopsy was 75.7% and 92.4%, respectively. The MRI location match percentage before and after biopsy was 89.3% and 94.1%, respectively.

Conclusions: Compared with other previous reports, our results show that the prostate cancer detection sensitivity of MRI is on the rise. Furthermore, MRI before prostate biopsy can provide more information by which to identify prostate cancer during prostate biopsy and thus reduce the false-negative rate.

Keywords: Biopsy; MRI; Prostate cancer.

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Conflict of interest statement

The authors have nothing to disclose.

Figures

FIG. 1
FIG. 1
Study design and schematic flow of group 1.
FIG. 2
FIG. 2
Study design and schematic flow of group 2.
FIG. 3
FIG. 3
(A) A 74-year-old male with prostate cancer. The PSA level was 7.3 ng/ml, GS was 7. The radical prostatectomy specimen showed one clear cancer foci. (B) The MRI images show a focal, round, low signal intensity area in the left peripheral zone.
See this image and copyright information in PMC

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