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• W2790263238 abstract "44 Background: The current ISUP/WHO grade group system classified the Gleason grade into five groups. Although presence of tertiary Gleason pattern 5 (tG5) reported to be related with unfavorable tumor characteristic, only a few data is available about influences on the grade group system of tG5 so far. In this study, we evaluated the effect of tG5 on recurrence following radical prostatectomy in patients with prostate cancer. Methods: We retrospectively evaluated 1,020 patients with prostate cancer who underwent radical prostatectomy without neoadjuvant therapy at the hospitals that the authors were affiliated with between 2005 and 2013. After excluding the patients with missing data or slides, 1000 patients were enrolled in this study. All prostatectomy specimen slides were reviewed by a single genitourinary pathologist according to ISUP 2014. Recurrence following radical prostatectomy was defined according to European Association of Urology guidelines. The endpoint was defined as an increase in PSA level. Results: Patient median age was 67 years (range 49–77 years). The median serum PSA was 6.9 ng/mL (range 0.4–82 ng/mL). The median follow-up period was 69 months (range 0.7–134 months). All the patients showed Group1:163 cases (16.3%), Group2: 436 (43.6%), Group 2 with tG5: 54 (5.4%), Group 3:121 (12.1%), Group 3 with tG5: 89 (8.9%), Group 4: 39 (3.9%), and Group 5: 98 (9.8%). PSA progression-free survival was significantly different among the five groups (Group1-5) (p = 0.0001). As concerning tG5, it showed significant difference between Group 2 and Group 2 with tG5 by using log rank test (p < 0.0001). Similarly, there was significant difference between Group 3 and Group 3 with tG5 (p = 0.001). On the other hand, there was no difference between Group 2 with tG5 and Group 3 (p = 0.916), and in the same way, no difference between Group 3 with tG5 and Group 4 (p = 0.854). Conclusions: The Presence of tG5 on the grade group system increase PSA progression following radical prostatectomy in patients with prostate cancer. Especially, Group 2 and 3 showed upgrade by presence of tG5. Integrating tG5 into the grade group system will improve the accuracy of patient outcome predictions." @default.
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• W2790263238 date "2018-02-20" @default.
• W2790263238 modified "2023-09-22" @default.
• W2790263238 title "The impact of tertiary Gleason pattern 5 in the grade group system on recurrence following radical prostatectomy in patients with prostate cancer." @default.
• W2790263238 doi "https://doi.org/10.1200/jco.2018.36.6_suppl.44" @default.
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