Medical Definition of blast crisis
: the terminal stage of chronic myelogenous leukemia that is characterized by a marked increase in the proportion of blast cells, by fever and pain in the bones, and by increased severity of anemia, thrombocytopenia, and splenomegaly—called also
Seen and Heard
What made you want to look up blast crisis? Please tell us where you read or heard it (including the quote, if possible).