Health Topics A-to-Z
Acute Lymphocytic Leukemia (ALL) in Adults
What Is It? Acute lymphocytic leukemia (ALL) is a type of leukemia. Leukemia is a cancer of the blood or bone marrow. ALL is also known as acute lymphoblastic leukemia and acute lymphoid leukemia. ALL is a cancer of the body’s blood-making system. Blood cells are produced in the bone marrow, the soft, inner part of bones.