MedicalTerminology DB

Meaning of human lymphocyte antigen: One of a group of proteins found on the surface of white blood cells and other cells that play an important part in the body's immune response to foreign substances.

Definition of human lymphocyte antigen

One of a group of proteins found on the surface of white blood cells and other cells that play an important part in the body's immune response to foreign substances. These antigens vary from person to person, and HLA tests are done before organ transplantation to find out if tissues match between a donor and a recipient. Also called HLA and human leukocyte antigen.

Written and maintained by James Murray Last updated July 21, 2026 Educational reference, not medical advice. Read the limitations.

For learning, not diagnosis. This glossary provides general educational information and is not a substitute for advice from a qualified healthcare professional. If you may be experiencing a medical emergency, contact local emergency services.