Pretransplant HLA typing revealed loss of heterozygosity in the major histocompatibility complex in a patient with acute myeloid leukemia.

Introduction: Chromosomal abnormalities are frequent events in hematological malignancies. The degree of HLA compatibility between donor and recipient in hematopoietic stem cell transplantation is critical.

Purpose Of The Study: In this report, we describe an acute myeloid leukemia case with loss of heterozygosity (LOH) encompassing the entire HLA.