A genomic classifier for prostate cancer correlates with adverse pathologic features: Transcriptomic features of cribriform and intraductal carcinoma of the prostate.

Authors

null

Zaeem M Lone

Cleveland Clinic Lerner College of Medicine, Cleveland, OH

Zaeem M Lone , Tarik Benidir , Magdalena Rainey , Monica Nair , Elai Davicioni , Ewan Gibb , Sean Williamson , Jane Nguyen , Shilpa Gupta , Moshe Chaim Ornstein , Rahul D. Tendulkar , Christopher Weight , Eric A. Klein , Omar Y. Mian

Organizations

Cleveland Clinic Lerner College of Medicine, Cleveland, OH, Cleveland Clinic Glickman Urological Institute, Cleveland, OH, Cleveland Clinic Foundation, Cleveland, OH, GenomeDx Biosciences Inc., San Diego, CA, Veracyte, San Diego, CA, Cleveland Clinic Department of Pathology, Cleveland, OH, Center for Urologic Oncology, Glickman Urological and Kidney Institute, Cleveland Clinic, Cleveland, OH, Taussig Cancer Institute, Cleveland Clinic Foundation, Cleveland, OH, Cleveland Clinic Cancer Center, Cleveland, OH, Cleveland Clinic, Cleveland, OH, Cleveland Clinic, Dept. of Radiation Oncology, Dept. of Translational Hematology Oncology Research, Cleveland, OH

Research Funding

No funding received

Background: Invasive cribriform and intraductal carcinoma (CF/IDC) portends an unfavorable prognosis for patients diagnosed with prostate cancer (CaP). Limited studies with small sample sizes have explored whether genomic classifiers are associated with IDC and/or CF status. We investigated the correlation between Decipher genomic risk score and IDC/CF status and assessed PCa transcriptomic features. Methods: We performed a retrospective review of CaP patients who had Decipher testing at a single high volume center between 2009-2020. The highest grade index lesion from radical prostatectomy specimens was identified by GU pathologists and used for Decipher testing. Genitourinary pathologists reviewed prostatectomy specimens for the presence of CF and IDC features. Patients were divided into three groups based on pathologic features, absent CF/IDC (CF-/IDC-), CF positive only (CF+/IDC-), and CF/IDC positive (CF+/IDC+). Categorical clinical, genomic, and pathologic variables were assessed using the Pearson Chi-Square test, quantitative with the Kruskal-Wallis test. Multivariable logistic regression was used to identify predictors of high-risk Decipher GC scores. The Kaplan-Meier method with log-rank was used to compare biochemical recurrence free survival. Differential gene expression and gene network analysis was used to identify genes and pathways associated with IDC/CF features. Results: 463 patients were included with a median follow-up of 25 months. Patients who were CF+/IDC+ had higher GC scores (CF+/IDC+: 0.77 vs. CF+/IDC-: 0.71 vs. CF-/IDC-: 0.61, p<0.001). Patients who were CF+/IDC+ had a higher percentage of Gleason grade group >3 (CF+/IDC+: 79% vs. CF+/IDC-: 52% vs. CF-/IDC-: 52%, p<0.001). On multivariate logistic regression, predictors of high-risk GC score were presence of CF+/IDC+ features on final pathology (OR: 3.94, p<0.001) and pathologic Gleason grade group >3 (OR: 1.58, p=0.04). Transcriptomic analysis revealed that the hallmark androgen response pathway was significantly upregulated in CF+/IDC+ patients (Log fold change: 15.7, p<0001). Conclusions: This is the largest series investigating the association of a clinically validated genomic classifier and pathologic features such as cribriform and intraductal carcinoma. These findings have implications for the use of genomic classifiers in settings where expert GU pathology is not readily available and in potentially unmasking adverse histology at the time of biopsy.

Multivariate regression for high risk decipher score.

High Risk Decipher Score
OR
95% CI
p-value
Cribriform/Intraductal Features
CF-/ID- (Reference Group)



CF+/ID-
2.55
1.52-4.26
<0.001
CF+/ID+
3.49
1.94-6.27
<0.001
Pathologic Gleason Grade
Gleason Grade Group >3
1.58
1.01-2.44
0.04

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Abstract Details

Meeting

2022 ASCO Genitourinary Cancers Symposium

Session Type

Poster Session

Session Title

Poster Session A: Prostate Cancer

Track

Prostate Cancer - Advanced,Prostate Cancer - Localized

Sub Track

Translational Research, Tumor Biology, Biomarkers, and Pathology

Citation

J Clin Oncol 40, 2022 (suppl 6; abstr 268)

DOI

10.1200/JCO.2022.40.6_suppl.268

Abstract #

268

Poster Bd #

L12

Abstract Disclosures

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