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International braz j urol

Print version ISSN 1677-5538On-line version ISSN 1677-6119

Abstract

BILLIS, Athanase et al. Predictive criteria of insignificant prostate cancer: what is the correspondence of linear extent to percentage of cancer in a single core?. Int. braz j urol. [online]. 2015, vol.41, n.2, pp.367-372. ISSN 1677-6119.  http://dx.doi.org/10.1590/S1677-5538.IBJU.2015.02.26.

Objective

The aim of active surveillance of early prostate cancer is to individualize therapy by selecting for curative treatment only patients with significant cancer. Epstein’s criteria for prediction of clinically insignificant cancer in surgical specimens are widely used. Epstein’s criterion “no single core with >50% cancer” has no correspondence in linear extent. The aim of this study is to find a possible correspondence.

Materials and Methods

From a total of 401 consecutive patients submitted to radical prostatectomy, 17 (4.2%) met criteria for insignificant cancer in the surgical specimen. The clinicopathologic findings in the correspondent biopsies were compared with Epstein’s criteria for insignificant cancer. Cancer in a single core was evaluated in percentage as well as linear extent in mm.

Results

Comparing the clinicopathologic findings with Epstein’s criteria predictive of insignificant cancer, there was 100% concordance for clinical stage T1c, no Gleason pattern 4 or 5, ≤2 cores with cancer, and no single core with >50% cancer. However, only 25% had density ≤0.15. The mean, median and range of the maximum length of cancer in a single core in mm were 1.19, 1, and 0.5-2.5, respectively. Additionally, the mean, median, and range of length of cancer in all cores in mm were 1.47, 1.5, and 0.5-3, respectively.

Conclusion

To pathologists that use Epstein’s criteria predictive of insignificant cancer and measure linear extent in mm, our study favors that “no single core with >50% cancer” may correspond to >2.5 mm in linear extent.

Keywords : Prostate; Biopsy, Needle Adenocarcinoma; Prostatectomy; Prostatic Neoplasms; Risk.

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