Prostatic Specific Antigen

Prostatic specific antigene is kalikrein-like serotonine protease. It is organ specific tumor marker for prostatic cancer, is produced by secretory epithelial cells.

Normal Value
Normal value is < 4 ng/ml, but with exceptions(!), this value changes with age of man. The value of PSA can be artificially elevated by prostatitis (infection), bicycling, ejaculation, instrumental examination of male urethra or examination of prostate by DRE.

Possible Characteristics of PSA

 * free/total PSA
 * PSAD (density) = PSA/body weight
 * PSAV (velocity) = increase per 1 year
 * PSADT (doubling time)

Related Articles

 * Prostatic Carcinoma