label: Atypical Chronic Myeloid Leukemia
label_lc: atypical chronic myeloid leukemia
description: A myelodysplastic/myeloproliferative neoplasm characterized by the presence of leukocytosis with increased numbers of neutrophils, promyelocytes, myelocytes, and metamyelocytes; blasts less than 20% in bone marrow and peripheral blood; dysgranulopoiesis; minimal or absent monocytosis; absence of eosinophilia; and presence of bone marrow hypercellularity with granulocytic proliferation and granulocytic dysplasia. Dysplasia in the erythroid and megakaryocytic lineages may be present or absent. No evidence of BCR/ABL fusion is present.