PSA Decline Greater than or Equal to 50 Percent

**Semantic type:** Laboratory or Test Result

**Definition:** A finding indicating that the blood concentration of prostate specific antigen in a subject's sample has decreased by at least 50 percent from the concentration recorded for a previous sample from that subject.

**Synonyms:** - Greater than or Equal to 50 Percent Reduction in Baseline PSA - Greater than or Equal to 50% Reduction in Baseline PSA - PSA Decline 50 Percent or Greater - PSA Decline 50 Percent or More - PSA Decline Fifty Percent or Greater - PSA Decline Fifty Percent or More - PSA Decline Greater than or Equal to Fifty Percent - PSA Decreased Greater than or Equal to 50 Percent - PSA Decreased Greater than or Equal to Fifty Percent