Factors associated with downgrading in patients with high grade prostate cancer

Jared M Whitson, Sima P. Porten, Janet E. Cowan, Jeff P. Simko, Matthew R. Cooperberg, Peter R. Carroll

Research output: Contribution to journalArticle

6 Scopus citations

Abstract

Objective:To determine the factors associated with downgrading between biopsy and prostatectomy in the contemporary era using extended-template biopsy techniques. Materials and methods:The UCSF Urologic Oncology Database was used to identify subjects diagnosed with high grade prostate cancer (primary pattern 4 or 5) in at least one core on extended-pattern biopsy. Multivariable logistic regression analysis was performed to identify independent factors associated with downgrading at radical prostatectomy, defined as a change from primary pattern 4 or 5 to primary pattern 3. Results:Downgrading occurred in 68 (34%) of 202 subjects who met the study criteria. Fourteen (47%) of 30 subjects with ≤25% of cores that were high grade and 9 (43%) of 21 subjects with <10% of total tissue containing cancer were downgraded. In a multivariable model, patients with mixed grade cores had much higher odds of downgrading than those with all high grade cores (OR 3.0 95% 1.3-7.1), P < 0.01). The proportion (per 10% increment) of positive cores containing high grade cancer (OR 0.8 95% CI 0.7-0.9 P < 0.01) and the percent (per 10% increment) of total tissue containing cancer (OR 0.7 95% CI 0.6-0.9 P = 0.01) were significantly associated with lower odds of downgrading. Conclusions:Downgrading following radical prostatectomy is a common event. Biopsy over-grading may preclude men from active surveillance or lead to unnecessary lymphadenectomy, excess radiation, or prolonged hormone therapy. The proportion of positive biopsy cores that are high grade and the percent of total tissue containing cancer should be incorporated into decision making.

Original languageEnglish (US)
Pages (from-to)442-447
Number of pages6
JournalUrologic Oncology: Seminars and Original Investigations
Volume31
Issue number4
DOIs
StatePublished - May 2013
Externally publishedYes

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Keywords

  • Biopsy
  • Gleason score
  • Prostatic neoplasms
  • Tumor staging

ASJC Scopus subject areas

  • Oncology
  • Urology

Cite this

Whitson, J. M., Porten, S. P., Cowan, J. E., Simko, J. P., Cooperberg, M. R., & Carroll, P. R. (2013). Factors associated with downgrading in patients with high grade prostate cancer. Urologic Oncology: Seminars and Original Investigations, 31(4), 442-447. https://doi.org/10.1016/j.urolonc.2011.02.010