Hematologic Oncology Glossary
100 terms total — 4 showing — Last updated 15 Sep 2026
extramedullary disease EM
Cancer involvement outside the bone marrow, occurring in organs or tissues not typically involved.
acute lymphoblastic leukemia
A rapidly progressing cancer of the lymphoid blood cells, commonly abbreviated as ALL in medical documentation.
blast cell
An immature hematopoietic cell characterized by large size, high nuclear-to-cytoplasmic ratio, and prominent nucleoli.
blast crisis
An acute transformation of chronic myeloid leukemia characterized by increased immature blood cells and resembling acute...
leukoerythroblastic reaction
The presence of immature white and red blood cells in peripheral circulation, often indicating bone marrow stress or inf...