Definition: An advanced phase of chronic myelogenous leukemia, characterized by a rapid increase in the proportion of immature white blood cells (blasts) in the blood and bone marrow to greater than 30%.
coordinate IM with specific neoplasm term /pathol (IM); note category; do not confuse with BLAST TRANSFORMATION see LYMPHOCYTE ACTIVATION; blast transformation in chronic myelogenous leukemia goes here not at LYMPHOCYTE ACTIVATION
See AlsoLymphocyte Activation