disease onset/diagnosis measurement leukemia onset/diagnosis measurement 2013-11-18T18:39:19Z Any measurement which expresses a quantity related to the beginning, early stages or development of the leukemia disease state, or to the official determination of leukemia as the cause of the observed symptom(s). Leukemia is any of a group of progressive, malignant diseases of the blood-forming organs, marked by distorted proliferation and development of leukocytes and their precursors in the blood and bone marrow. CMO:0001903 JSmith clinical_measurement_ontology