What is acute myeloid leukemia? Acute myeloid leukemia, or AML, is a type of blood cancer in which the bone marrow makes too many immature blood cells called myeloblasts. Find our full video library only on Osmosis: http://osms.it/more. Join millions of current and future clinicians who learn by Osmosis, along with hundreds of universities around the world who partner with Osmosis from Elsevier