PSA Decline Greater than or Equal to 90 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 90 percent or more when compared to the value recorded for a previous sample from that subject.

**Synonyms:** - PSA Decline 90 Percent or Greater - PSA Decline 90 Percent or More - PSA Decline Greater than or Equal to Ninety Percent - PSA Decline Ninety Percent or Greater - PSA Decline Ninety Percent or More - PSA Decrease Greater than or Equal to 90 Percent - PSA Decrease Greater than or Equal to Ninety Percent