Downgrading from Biopsy Grade Group 4 Prostate Cancer in Patients Undergoing Radical Prostatectomy for High or Very High Risk Prostate Cancer

Weranja Ranasinghe, Chad A. Reichard, Yaw A. Nyame, Debasish Sundi, Jeffrey J. Tosoian, Lamont Wilkins, Ridwan Alam, Mary F. Achim, Xuemei Wang, Andrew J. Stephenson, Eric A. Klein, Ashley E. Ross, Mohamad E. Allaf, John W. Davis, Brian F. Chapin

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

PURPOSE: We examined rates of Grade Group 4 downgrading at radical prostatectomy among men diagnosed with high and very high risk prostate cancer at biopsy. MATERIALS AND METHODS: A pooled cohort of 1,776 patients from 3 tertiary referral centers who underwent radical prostatectomy for National Comprehensive Cancer Network® high risk (prostate specific antigen greater than 20 ng/ml, or Grade Group 4-5, or clinical stage T3 or greater) or very high risk (primary Gleason pattern 5, or more than 4 biopsy cores with Grade Group 4-5, or 2 or more high risk features) disease from 2005 to 2015 were reviewed. Overall 893 patients with Grade Group 4 disease at biopsy were identified and 726 patients were available for analysis. Multivariable logistic regression models were fit to determine factors associated with downgrading to Grade Group 3 or less at radical prostatectomy. RESULTS: Overall 333 (45%) cases were downgraded to Grade Group 3 or less at radical prostatectomy. Of these cases 198 (27%) had concordant Grade Group 4 biopsy and radical prostatectomy pathology and 195 (27%) were upgraded at radical prostatectomy to Grade Group 5. Of high risk cases with biopsy Grade Group 4 disease 49% had any downgrading vs 29% of very high risk cases (p <0.0001). Downgrading to Grade Group 2 or less occurred in 16% (98 of 604) of high risk and 7% (8 of 122) of very high risk cases (p <0.01). Downgraded cases had a lower prostate specific antigen, fewer positive biopsy cores and lower clinical stage (p <0.01). On multivariable analysis fewer positive biopsy cores were significantly associated with downgrading at radical prostatectomy (p <0.01). CONCLUSIONS: In this cohort of patients with high risk/very high risk prostate cancer, downgrading from biopsy Grade Group 4 at radical prostatectomy occurred less frequently than in other published reports. Any downgrading was significantly less common in very high risk compared to high risk patients, and downgrading to Grade Group 2 or less occurred in a minority of cases in high risk and very high risk patients.

Original languageEnglish (US)
Pages (from-to)748-753
Number of pages6
JournalThe Journal of urology
Volume204
Issue number4
DOIs
StatePublished - Oct 1 2020

Keywords

  • neoplasm grading
  • prostatic neoplasms
  • risk

ASJC Scopus subject areas

  • Urology

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