NCAM1 and acute myeloid leukemia: Other notable differences between the groups included a higher incidence of AML M4 (36.6% versus 25.6%), AML M5 (18.8% versus 9.6%), CD56 expression (22.3% versus 9.9%), and leukocytosis (28,100/μL versus 9,500/μL) in cases with extramedullary involvement.