Leukemia is a malignant disease of the hematopoietic stem cells, characterized by overgrowth of white blood cells in the bone marrow of a different stage maturation.
Hvítblæði er illkynja sjúkdómur í blóðmyndandi frumum líkamans sem einkennist af offjölgun hvítra blóðkorna í beinmerg af mismunandi þroskastigum eftir tegund hvítblæðis.