HLA Typing is a laboratory test that identifies specific variations in the human leukocyte antigen (HLA) genes. These genes play a crucial role in the immune system by helping the body recognize which cells are its own and which are foreign. HLA typing is essential for organ transplantation, as matching donor and recipient HLA types can reduce the risk of transplant rejection. The process involves collecting a sample, usually from blood or cheek cells, and analyzing it to determine the HLA alleles present. Accurate HLA typing helps doctors make informed decisions about suitable donors for patients needing transplants, improving the chances of successful outcomes.