How we perform alloHCT for an older patient with a hematologic malignancy. HLA, human leukocyte antigen. *Severe comorbidities: New York Heart Association class 4 heart failure, severe renal dysfunction or end-stage renal disease on dialysis, Child class C liver cirrhosis, Gold stage 4 chronic obstructive lung disease, metastatic solid tumor, dementia, or any comorbidity significantly limiting life expectancy.