prolymphocytic leukemia
(proh-LIM-foh-SIH-tik loo-KEE-mee-uh)
A type of chronic lymphocytic leukemia (CLL), in which too many immature white blood cells (prolymphocytes) are found in the blood and bone marrow. Prolymphocytic leukemia usually progresses more rapidly than classic CLL. Also called PLL.