C-11 Choline PET-CT Scan in Finding Metastases in Patients With Newly Diagnosed High-Risk Prostate Cancer

Overview

RATIONALE: New diagnostic procedures, such as C-11 choline PET-CT scan, may be effective in finding cancer that has spread to the bone and lymph nodes in patients with prostate cancer. PURPOSE: This clinical trial is studying how well C-11 choline PET-CT scan works in finding metastases in patients with newly diagnosed high-risk prostate cancer.

OBJECTIVES: Primary * To determine the sensitivity and specificity of PET-CT scan using C-11 choline in detecting bone and lymph node metastases in patients with newly diagnosed high-risk adenocarcinoma of the prostate. Secondary * To perform semi-quantitative analysis of tracer uptake using standard uptake values and qualitative analysis using pure visual analysis. * To develop an algorithm that includes the routine use of C-11 choline PET-CT scan for the staging of patients with prostate cancer at high risk of metastatic disease. * To determine whether the presence of C-11 choline PET-CT scan positivity in these patients is predictive of outcomes, including biochemical relapse-free survival, time to development of clinically apparent metastases, time to local failure, and overall survival. * To obtain tissue specimens from these patients for correlative studies and further evaluation. * To obtain information regarding the feasibility and characteristics of C-11 choline PET-CT scan after androgen suppression. OUTLINE: Patients undergo CT scan of the abdomen and pelvis with IV contrast and a bone scan. Patients also undergo a C-11 choline PET-CT scan\*. In the case of any positive scan, patients undergo a needle biopsy. If the biopsy is negative for metastatic disease or if the biopsy is positive for metastatic disease in a draining lymph node region, patients receive radiotherapy and hormonal (antiandrogen) therapy. If the biopsy is positive for metastatic disease at any other site, patients receive hormonal therapy alone. NOTE: \*The first 10 patients enrolled on the study who have a positive PET-CT scan and positive biopsy undergo a second PET-CT scan at 6 months after the initial PET-CT scan. Patients are followed every 3 months for 1 year and then every 6 months for 1 year.

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Outcomes