These are cancers of two different types of blood cells: lymphocytes and myeloid cells.
Myeloid cells are represented by a more heterogenous population of cells including neutrophils, eosinophils, basophils, monocytes, megakaryocytes, each causing different types of leukemia
. These leukemias can also be acute or chronic. Generally, lymphocytic is better than myeloid, and chronic better than acute.