ALL DEFINITIONSProlymphocytic LeukemiaDefinitionProlymphocytic leukemia (PLL) is a rare type of cancer of the blood and bone marrow. Types of PLL include B-cell prolymphocytic leukemia (B-PLL) and T-cell prolymphocytic leukemia (T-PLL). Related SpecialistsShowing 3 of 8Stephanie MassaroMD, MPHAndrew HaimsMDStephanie HaleneMD, Dr MedMore Related Specialists