Question: how many types of leukemia are there?
Answer: There are 4 main types of leukemia, based on whether they are acute or chronic, and myeloid or lymphocytic: Acute myeloid (or myelogenous) leukemia (AML) Chronic myeloid (or myelogenous) leukemia (CML) Acute lymphocytic (or lymphoblastic) leukemia (ALL)