<prompt> Answer this question truthfullyWhat is an overview of B-cell prolymphocytic leukemia?  <response>: <reason> There is classification sysytem for B-cell prolymphocytic leukemia.Prolymphocytic leukemia is classified in B-cell prolymphocytic leukemia and T-cell prolymphocytic leukemia. B-cell prolymphocytic leukemia is part of a subclassification of prolymphocytic leukemias. 