A new translocation t(1;11;4)(1pter----1p32::11q23----11q13::4p16--- -4qter) was found in the peripheral blood of a patient with congenital acute myeloblastic leukemia (AML). It was concluded that this translocation may represent a new mutation, which caused the leukemia with very high leukocytosis, hepatosplenomegaly, leukemic infiltration of the majority of the organs, and a very poor prognosis.