Impact of Decipher Biopsy testing on clinical outcomes in localized prostate cancer in a prospective statewide collaborative.
Prostate cancer and prostatic diseases
BACKGROUND: Decipher Biopsy is a commercially available gene expression classifier used in risk stratification of newly diagnosed prostate cancer (PCa). Currently, there are no prospective data evaluating its clinical utility. We seek to assess the clinical utility of Decipher Biopsy in localized PCa patients.
METHODS: A multi-institutional study of 855 men who underwent Decipher Biopsy testing between February 2015 and October 2019. All patients were tracked through the prospective Michigan Urological Surgery Improvement Collaborative and linked to the Decipher Genomics Resource Information Database (GRID
RESULTS AND LIMITATIONS: Eight hundred fifty-five patients underwent Decipher Biopsy testing during the study period. Of the 855 men, 264 proceeded to AS (31%), and 454 (53%) received radical therapy. In men electing AS, after adjusting for NCCN risk group, age, PSA, prostate volume, body mass index, and percent positive cores, a high-risk Decipher score was independently associated with shorter TTT (HR 2.51, 95% CI 1.52-4.13 p < 0.001). Similarly, in patients that underwent radical therapy, a high-risk Decipher score was independently associated with TTF (HR 2.98, 95% CI 1.22-7.29, p = 0.01) on multivariable analysis. Follow-up time was a limitation.
CONCLUSION: In a prospective statewide registry, high-risk Decipher Biopsy score was strongly and independently associated with conversion from AS to definitive treatment and treatment failure. These real-world data support the clinical utility of Decipher Biopsy. An ongoing phase 3 randomized trial (NCT04396808) will provide level 1 evidence of the clinical impact of Decipher biopsy testing.
Vince RA Jr, Jiang R, Qi J, Tosoian JJ, Takele R, Feng FY, Linsell S, Johnson A, Shetty S, Hurley P, Miller DC, George A, Ghani K, Sun F, Seymore M, Dess RT, Jackson WC, Schipper M, Spratt DE, Morgan TM. Impact of Decipher Biopsy testing on clinical outcomes in localized prostate cancer in a prospective statewide collaborative. Prostate Cancer Prostatic Dis. 2021 Jul 20:10.1038/s41391-021-00428-y. doi: 10.1038/s41391-021-00428-y. Epub ahead of print. PMID: 34285350; PMCID: PMC8770695.