what is the word origin of myelo- as in myelofibrosis or myeloma? I know that these are plasma cancers originating in the bone marrow.
myelo- is from Greek related to the word for 'marrow'.
See also: http://www.dictionary.com/browse/myelo-
Most cancers are named in a similar matter, with the tissue of origin followed by the suffix "-oma": glioma from glial cells, sarcoma from the connective tissues/"flesh",
medical terms are mainly based on Greek and Latin words, myel(myelo) is a root which means bone marrow and it also can mean spinal cord , it depends on the word. in myeloma , myelo means bone marrow and oma is a suffix which means tumor just like lymphom( cancer of lymphatic system ). ex: meylitis: inflammation of spinal cord , but , myeloma : cancer of the bone marrow