Evaluation of Molecular Forms of PSA and Human Kallikrein 2 in a Cohort of Patients With Locally Resected Prostate Cancer But Biochemical Recurrence

Venous blood will be collected in an EDTA Vacutainer tubeup to 10 mL and will be immediately put on ice. This sample may be drawn as a stand-alone blood draw. Samples will be centrifuged at 1900g (3000-3200 RPM) for 15 Minutes and the serum aliquoted into freezer vials and stored at -80°C until analysis. In addition patients who have not received treatment for biochemical recurrence after their first draw are eligible for subsequent draws to determine the reproducibility of the test over time.