A myeloid neoplasm that results_in the overproduction of white blood cells. [ http://purl.obolibrary.org/obo/ECO_0007645 url:http://www.bloodjournal.org/content/114/5/937.long url:https://www.cancer.gov/types/myeloproliferative/patient/mds-mpd-treatment-pdq http://purl.obolibrary.org/obo/ECO_0007637 url:http://www.bloodjournal.org/content/127/20/2391 url:http://www.bloodjournal.org/content/128/3/462 ]