Collection Notes: Samples should be obtained before biopsy, prostatectomy, prostatic massage or digital rectal examination because manipulation of the prostate gland may lead to elevated PSA levels that persist for up to three weeks. Plasma is not acceptable.
Clinical Utility: Useful for monitoring recurrence and response to treatment in patients with a history of prostate cancer. Elevated levels have been reported in inflammatory conditions of the prostate, benign prostatic hypertrophy, and prostate cancer.
Serum (1 mL)
Ambient 8 Hours
Refrigerated 5 Days
Frozen 24 Weeks
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