leukemia leukemia, non-human animal canine neoplasm canine leukemia https://github.com/monarch-initiative/mondo/issues/5252 An acute or chronic malignant (clonal) hematologic disorder, arising from hematopoietic stem cells in dogs. It is characterized by the presence of primitive or atypical myeloid or lymphoid cells in the bone marrow and the blood. NCIT:C128120 MONDO:0700144