A bone marrow cancer that is formed of any one of the bone marrow cells belonging to the granulocytic (neutrophil, eosinophil, basophil), monocytic/macrophage, erythroid, megakaryocytic and mast cell lineages. [ http://purl.obolibrary.org/obo/ECO_0007645 url:http://www.bloodjournal.org/content/bloodjournal/128/3/462.full.pdf url:https://www.ncbi.nlm.nih.gov/pubmed/19357394 ]