For a newly diagnosed patient with no prior treatment, untreated adult acute lymphoblastic leukemia (ALL) is defined by the following: Abnormal white blood cell count and differential. Abnormal hematocrit/hemoglobin and platelet counts. Adult acute lymphoblastic leukemia (ALL) is a type of cancer in which the bone marrow makes too many lymphocytes (a type of white blood cell). Leukemia may affect red blood cells, white blood cells, and platelets. Previous chemotherapy and exposure to radiation may increase the risk of developing ALL.
Acute Lymphocytic Leukemia (ALL) in Adults Acute lymphocytic (or lymphoblastic) leukemia is sometimes called ALL. It starts in the bone marrow where blood cells are made. It is more common in children than in adults.