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Clinical Research

A genomic classifier predicting metastatic disease progression in men with biochemical recurrence after prostatectomy

Abstract

Background:

Due to their varied outcomes, men with biochemical recurrence (BCR) following radical prostatectomy (RP) present a management dilemma. Here, we evaluate Decipher, a genomic classifier (GC), for its ability to predict metastasis following BCR.

Methods:

The study population included 85 clinically high-risk patients who developed BCR after RP. Time-dependent receiver operating characteristic (ROC) curves, weighted Cox proportional hazard models and decision curves were used to compare GC scores to Gleason score (GS), PSA doubling time (PSAdT), time to BCR (ttBCR), the Stephenson nomogram and CAPRA-S for predicting metastatic disease progression. All tests were two-sided with a type I error probability of 5%.

Results:

GC scores stratified men with BCR into those who would or would not develop metastasis (8% of patients with low versus 40% with high scores developed metastasis, P<0.001). The area under the curve for predicting metastasis after BCR was 0.82 (95% CI, 0.76–0.86) for GC, compared to GS 0.64 (0.58–0.70), PSAdT 0.69 (0.61–0.77) and ttBCR 0.52 (0.46–0.59). Decision curve analysis showed that GC scores had a higher overall net benefit compared to models based solely on clinicopathologic features. In multivariable modeling with clinicopathologic variables, GC score was the only significant predictor of metastasis (P=0.003).

Conclusions:

When compared to clinicopathologic variables, GC better predicted metastatic progression among this cohort of men with BCR following RP. While confirmatory studies are needed, these results suggest that use of GC may allow for better selection of men requiring earlier initiation of treatment at the time of BCR.

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Acknowledgements

AER is supported by the John Hopkins Clinician Scientist Award, EMS is supported by the Howard Hughes Clinician-Scientist Early Careers Award and AUA/Astellas Rising Star Award, and DS is supported by NIH Training Grant T32DK007552.

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Correspondence to A E Ross.

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Competing interests

Mercedeh Ghadessi, Nicholas Erho, Anamaria Crisan, Christine Buerki, and Ismael A Vergara are employees of GenomeDx Biosciences. Darby J S Thompson is a consultant for GenomeDx Biosciences. Timothy J Triche and Elai Davicioni are founders of GenomeDx Biosciences. The remaining authors declare no conflict of interest.

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Supplementary Information accompanies the paper on the Prostate Cancer and Prostatic Diseases website

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Ross, A., Feng, F., Ghadessi, M. et al. A genomic classifier predicting metastatic disease progression in men with biochemical recurrence after prostatectomy. Prostate Cancer Prostatic Dis 17, 64–69 (2014). https://doi.org/10.1038/pcan.2013.49

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  • DOI: https://doi.org/10.1038/pcan.2013.49

Keywords

  • biochemical recurrence
  • genomic classifier
  • prognostic models
  • metastasis
  • clinical validation

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