Definitions of histocompatibility typing terms

Area of Science:

• Immunogenetics
• Transplantation Science
• Medical Terminology

Background:

• Histocompatibility testing complexity increases with new Human Leukocyte Antigen (HLA) alleles.
• Standardized HLA typing terminology is essential for effective communication among physicians, laboratories, and donor registries.
• Current HLA typing assignments require a unified language for accurate donor-recipient matching.

Framework:

• The Harmonization of Histocompatibility Typing Terms Working Group was formed in 2010.
• Representatives from Clinical, Registry, and Histocompatibility organizations collaborated to define consensual terminology.
• The group aimed to establish a common language for communicating histocompatibility typing information.

Implementation:

• Defined terms for HLA typing resolution, HLA matching, and reporting formats.
• Addressed definitions for verification typing and extended typing.
• A collaborative document was created through feedback and discussion over a 90-day review period.

Implications:

• The established definitions facilitate clearer communication in histocompatibility testing.
• Standardized terminology supports improved accuracy in donor-recipient matching for transplantation.
• Ongoing evolution of histocompatibility testing necessitates future refinement of these definitions.