PSMA-PET Imaging for Detecting Early Metastatic Prostate Cancer in Men w/ High Decipher Test Scores

Normally, some patients with prostate cancer undergo imaging tests to determine the extent (spread) of their disease. These imaging tests often give good information, but not in all patients and not every time. This study deals with a new imaging test known as F-DCFPyL-Prostate-specific Membrane Antigen (PSMA) Positron Emission Tomography (PET), or F-DCFPyL-PSMA PET. The objective of this study is to evaluate safety and usefulness of using F-DCFPyL in detecting recurrent/metastatic prostate cancer. The F-DCFPyL PET imaging technique is used in some parts of the world but is not currently standard imaging care. Better understanding how this new imaging test performs in identifying recurrent/metastatic prostate cancer may lead to better management of prostate cancer patients in the future.

• F-DCFPyL Injection (Drug), also known as Imaging agent: F-DCFPyL Injection is a radioactive diagnostic imaging agent indicated for imaging of patients with recurrent prostate cancer.
• PSMA PET (Diagnostic test), also known as Prostate-specific Membrane Antigen (PSMA), Positron Emission Tomography (PET): PSMA PET imaging (for men with high GC >0.45) will be done after 2 years post-treatment, then yearly up to 5 years.

Primary outcomes

• Concordance (AUC) Between High Tumor GC Risk Score and Positive PSMA-PET Imaging Findings [Up to 5 years]: To estimate the concordance between tumor GC risk score and early metastatic disease using PSMA-PET imaging.

Secondary outcomes

• Rate of Positive PSMA-PET Findings [Up to 5 years]: 5-yr positive PSMA-PET findings in men with high GC score. At the end of the study (5 years), cumulative incidence of positive metastasis on PSMA-PET imaging will be calculated.

Sex: Male, ages: 18 Years to any

Inclusion Criteria:

* This study will enroll 60 patients previously enrolled to MCC#18523, "A Validation Study on the Impact of Decipher® Testing on Treatment Recommendations in African-American and Non-African American Men with Prostate Cancer: (VANDAAM)" that had high risk Decipher test results (Decipher score >0.45).
* Eastern Cooperative Oncology Group (ECOG) Performance Status: 0-1
* Previously enrolled to MCC#18523
* Genomic Classifier (GC) testing successfully completed on biopsy and/or surgical specimen
* Decipher score from participation on the MCC#18523 study meets the criteria for high-risk (>0.45)
* Treated with radical prostatectomy (RP) or radiation therapy (RT) (+/- short-term androgen deprivation therapy (ADT)) with ≥2 years follow up
* Age > 18

Exclusion Criteria:

* No follow up information available post treatment
* Unable to undergo PET imaging due to pre-existing comorbidities and/or claustrophobia
* Administration of any radioisotope within 5 physical half-lives OR any IV X-ray contrast medium within 24 hours OR any high-density oral contrast medium (oral water contrast acceptable) within 5 days prior to study drug injection

• Kosj Yamoah, M.D., Ph.D., Principal investigator, H. Lee Moffitt Cancer Center and Research Institute