FLT3 and leukemia: There were 8/13 (62%) post-transplant leukemia relapses in patients who were FLT3 MRD(+)/MRD-FC(+), 2/8 (25%) relapses in FLT3 MRD(−)/MRD-FC (+,) group and 1/7 (14%) disease recurrence in those who had FLT3 MRD(+)/MRD-FC(−).