precursor T-lymphoblastic leukemia

(pree-KER-ser T-LIM-foh-BLAS-tik loo-KEE-mee-uh) A type of leukemia (blood cancer) in which too many T-cell lymphoblasts (immature white blood cells) are found in the blood and bone marrow. Also called T-cell acute lymphoblastic leukemia and T-cell acute lymphocytic leukemia.