Leukemia, Myeloid, Chronic, Atypical, BCR-ABL Negative

**Definition:** A myelodysplastic/myeloproliferative disorder characterized by myelodysplasia associated with bone marrow and peripheral blood patterns similar to CHRONIC MYELOID LEUKEMIA, but cytogenetically lacking a PHILADELPHIA CHROMOSOME or bcr/abl fusion gene (GENES, ABL).

**Tree numbers:** - C04.557.337.539.300 - C15.378.190.615.500 - C15.378.508.539.300 - C23.550.291.500.493

**Synonyms:** - Myeloid Leukemia, Philadelphia-Negative - Leukemia, Myeloid, Philadelphia-Negative - Leukemia, Myelogenous, Ph1 Negative - Leukemia, Myelogenous, Ph1-Negative - Myelogenous Leukemia, Ph1-Negative - Leukemia, Myeloid, Ph1 Negative - Leukemia, Myeloid, Ph1-Negative - Myeloid Leukemia, Ph1-Negative - Atypical Chronic Myeloid Leukemia - Chronic Myeloid Leukemia, Atypical - Leukemia, Myeloid, Philadelphia Negative - Leukemia, Myeloid, Chronic, Atypical