human leukocyte antigen polymorphism

synonym: HLA Polymorphism
https://doi.org/10.1351/goldbook.13231
Discontinuous genetic variation in the major histocompatibility complex (MHC) that results in the occurrence of several different forms of MHC molecules among people.
Note: Specific HLA polymorphisms are associated with a number of diseases, e.g., HLA-B27 is associated with ankylosing spondylitis, psoriatic arthritis, rheumatoid arthritis (RA), etc., and some chemical sensitivities.
Source:
PAC, 2012, 84, 1113. (IUPAC glossary of terms used in immunotoxicology (IUPAC Recommendations 2012)) on page 1178 [Terms] [Paper]