Kaplan-Meier curves comparing event-free survival (A) (P = .39) and overall survival (B) (P = .46) between acute myeloid leukemia (AML) subtypes in patients with Down syndrome. Abbreviations: AML-E, acute erythroblastic leukemia; AML-MK, acute megakaryoblastic leukemia; AML-MK/E, AML with mixed MK and E features; AML-NOS, AML–not otherwise specified; AML-U, AML-undifferentiated.