Case 2—Chronic GVHD. A 59-year-old male with a history of acute myeloblastic leukemia with FLT3 internal tandem duplication (AML-FLT3/ITD) underwent an allogeneic stem cell transplant using PBSC from a 100% HLA-matched related donor (sister) in August 2023. This evidence concerns the gene FLT3 and acute myeloid leukemia.