An aggressive (fast-growing) type of leukemia (blood cancer) in which too many B-cell lymphoblasts (immature white blood cells) are found in the bone marrow and blood. It is the most common type of acute lymphoblastic leukemia (ALL). Also called B-cell acute lymphocytic leukemia and precursor B-lymphoblastic leukemia.

What is the survival rate of B-cell leukemia?

The NCI estimates about 6,000 new cases of ALL are diagnosed annually. The 5-year survival rate for ALL is 69.9 percent.

What is pre B-cell ALL?

In between 75-80% of adult cases, ALL arises in B-lymphocytes in the early stages of development in the bone marrow. The disease is therefore called precursor B-cell ALL or Pre-B-cell ALL. B-cell ALL arises in more mature developing lymphocytes.