Gallium Ga 68-labeled PSMA-11 PET/CT in Detecting Recurrent Prostate Cancer in Patients After Initial Therapy

Gallium Ga 68-labeled PSMA-11 PET/CT in Detecting Recurrent Prostate Cancer in Patients After Initial Therapy

This clinical trial studies how well gallium Ga 68-labeled prostate-specific membrane antigen (PSMA)-11 positron emission tomography (PET)/computed tomography (CT) works in detecting prostate cancer that has come back (recurrent) in patients after initial therapy. Diagnostic procedures, such as gallium Ga 68-labeled PSMA-11 PET/CT, may help doctors detect tumors that have come back after initial therapy.

PRIMARY OBJECTIVE: I. To assess the sensitivity on a per-patient and per-region-basis of Gallium Ga 68 Gozetotide (68Ga-PSMA-11) PET for detection of tumor location confirmed by histopathology/biopsy, clinical and conventional imaging follow-up. SECONDARY OBJECTIVES: I. To assess the positive predictive value (PPV) on a per-patient and per-region-basis of 68Ga-PSMA-11 PET for detection of tumor location confirmed by histopathology/biopsy, clinical and conventional imaging follow-up (composite reference standard). II. To assess the sensitivity and positive predictive value (PPV) on a per-patient and per-region-basis of 68Ga-PSMA-11 PET for detection of tumor location confirmed by histopathology/biopsy only. III. To assess the detection rates on a per-patient basis of 68Ga-PSMA-11 PET stratified by prostate specific antigen (PSA) value (0.2 - < 0.5, 0.5 - < 1.0, 1.0 - < 2.0, 2.0 - < 5.0, >= 5.0). IV. To assess the impact of 68Ga-PSMA-11 PET on clinical management in biochemical recurrence (BCR) patients. V. To assess the inter-reader reproducibility. VI. To assess the safety of 68Ga-PSMA-11 PET. VII. To assess the detection rates on a per-patient basis of 68Ga-PSMA-11 PET stratified by PSA velocity and PSA doubling-time. OUTLINE: Patients receive gallium Ga 68-labeled PSMA-11 intravenously (IV). Beginning 50-100 minutes after receiving gallium Ga 68-labeled PSMA-11, patients undergo PET imaging. After completion of study, patients are followed up for 3-12 months.

Patients receive gallium Ga 68-labeled PSMA-11 IV. Beginning 50-100 minutes after receiving gallium Ga 68-labeled PSMA-11, patients undergo PET imaging.

(68)Ga labeled Glu-NH-CO-NH-Lys(Ahx)-HBED-CC, (68)Ga-labeled Glu-urea-Lys(Ahx)-HBED-CC, (68)Ga-PSMA Ligand Glu-urea-Lys(Ahx)-HBED-CC, (68)Gallium-PSMA Ligand Glu-urea-Lys(Ahx)-HBED-CC, (68Ga)Glu-urea-Lys(Ahx)-HBED-CC, 68Ga-DKFZ-PSMA-11, 68Ga-HBED-CC-PSMA, 68Ga-labeled Glu-NH-CO-NH-Lys(Ahx)-HBED-CC, 68Ga-PSMA, 68Ga-PSMA-11, 68Ga-PSMA-HBED-CC, [68Ga] Prostate-specific Membrane Antigen 11, [68Ga]GaPSMA-11, Ga PSMA, Ga-68 labeled DKFZ-PSMA-11, Ga-68 labeled PSMA-11, Gallium Ga 68 PSMA-11, Gallium Ga 68-labeled PSMA-11, GALLIUM GA-68 GOZETOTIDE, Gallium-68 PSMA, Gallium-68 PSMA Ligand Glu-urea-Lys(Ahx)-HBED-CC, GaPSMA, PSMA-HBED-CC GA-68

Medical Imaging, Positron Emission Tomography, PET, PET Scan, Positron Emission Tomography Scan, Positron-Emission Tomography, proton magnetic resonance spectroscopic imaging

Sensitivity on a per-patient and per-region-basis of gallium Ga 68-labeled PSMA-11 positron emission tomography for detection of tumor location

Confirmed by histopathology/biopsy, clinical and conventional imaging follow-up. Will be calculated and reported along with the corresponding two-sided 95% confidence intervals. The confidence intervals will be constructed using the Wilson score method.

Positive predictive value (PPV) on a per-patient and per-region-basis of gallium Ga 68-labeled PSMA-11 positron emission tomography for detection of tumor location

Confirmed by histopathology/biopsy and, clinical and conventional imaging follow-up. Will be calculated and reported along with the corresponding two-sided 95% confidence intervals. The paired McNemar's test will be used to compare the positive predictive values of gallium Ga 68-labeled PSMA-11 positron emission tomography imaging to the positive predictive values of conventional imaging.

Sensitivity and PPV on a per-patient and per-region-basis of 68Ga-PSMA-11 positron emission tomography (PET) for detection of tumor location confirmed by histopathology/biopsy

Will be summarized in tabular format. Ninety-five confidence intervals of sensitivity, specificity, and net present value (NPV) will be calculated using the Wilson score method.

Detection rates on a per-patient basis of gallium Ga 68-labeled PSMA-11 positron emission tomography stratified by PSA value

Detection rates on a per-patient basis of gallium Ga 68-labeled PSMA-11 positron emission tomography stratified by PSA value (0.2 - < 0.5, 0.5 - < 1.0, 1.0 - < 2.0, 2.0 - < 5.0, >= 5.0) and PSA velocity/doubling-time will be summarized in tabular format and compared between PSA strata using chi-square analysis.

Detection rates on a per-patient basis of gallium Ga 68-labeled PSMA-11 positron emission tomography stratified by PSA velocity and PSA doubling-time

Detection rates on a per-patient basis of gallium Ga 68-labeled PSMA-11 positron emission tomography stratified by PSA value (0.2 - < 0.5, 0.5 - < 1.0, 1.0 - < 2.0, 2.0 - < 5.0, >= 5.0) and PSA velocity/doubling-time will be summarized in tabular format and compared between PSA strata using chi-square analysis.

The impact of gallium Ga 68-labeled PSMA-11 positron emission tomography on clinical management in biochemical recurrence patients will be evaluated using descriptive statistics.

Inter-reader reproducibility for positivity at the patient level and region level will be reported using the Fleiss' Kappa test for multiple readers.

Safety will be reported descriptively as rates of patient reported adverse events. Additionally, adverse events will be characterized and quantified by Common Terminology Criteria for Adverse Events 4.03.

Inclusion Criteria: Histopathological proven prostate adenocarcinoma Rising PSA after definitive therapy with prostatectomy or radiation therapy. Post radical prostatectomy (RP) PSA equals to or greater than 0.2 ng/mL measured more than 6 weeks after RP Post-radiation therapy - American Society for Therapeutic Radiation and Oncology (ASTRO)-Phoenix consensus definition Nadir + greater than or equal to 2 ng/mL rise in PSA Karnofsky performance status of >= 50 (or Eastern Cooperative Oncology Group [ECOG]/ World Health Organization [WHO] equivalent) Ability to understand a written informed consent document, and the willingness to sign it Exclusion Criteria: Concomitant investigational therapy Known inability to lie flat, remain still or tolerate a PET scan Patient undergoing active treatment for non-prostate malignancy, other than skin basal cell or cutaneous superficial squamous cell carcinoma that has not metastasized and superficial bladder cancer

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