PSA 25 Percent or Greater than Nadir

**Semantic type:** Laboratory or Test Result

**Definition:** A finding indicating that the blood concentration of prostate specific antigen in a subject's sample has increased by 25 percent or more over the lowest value recorded for a sample from that subject.

**Synonyms:** - PSA 25% or Greater than Nadir - PSA Greater than or Equal to 25 Percent Above Nadir - PSA Twenty Five Percent or Greater than Nadir - PSA Twenty-Five Percent or Greater than Nadir