label: atypical chronic myeloid leukemia, BCR-ABL1 negative
label_lc: atypical chronic myeloid leukemia, bcr-abl1 negative
description: A myelodysplastic/myeloproliferative neoplasm characterized by the principal involvement of the neutrophil series with leukocytosis and multilineage dysplasia. The neoplastic cells do not have a Philadelphia chromosome or the BCR/ABL fusion gene. (WHO, 2001)