Panel Reactive Antibody Test

**Semantic type:** Laboratory Procedure

**Definition:** An assessment of the reactivity between host immune cells and donor human leukocyte antigen. This test is most commonly carried out in subjects awaiting transplant. The recipient's blood or serum is mixed with either a panel of lymphocytes from random blood donations or a potential donor's purified human leukocyte antigens (HLA). Host reactivity is scored as a percent.

**Synonyms:** - Cross-Matching - Crossmatch - Crossmatching - PRA - PRA Score - PRAB - Panel Reactive Antibody - Panel Reactive Antibody - Percent Panel Reactive Antibody - Percent Reactive Antibody - Percent Reactive Antibody