ANPEP and B-cell non-Hodgkin lymphoma: The reason we chose our treatment regimens consisting of alternate rituximab/bendamustine and rituximab/cladribine was that the patient had high-risk features [3] and was suspected to have refractory disease due to (1) partially treated, (2) clearly in a leukemic phase, and (3) aberrant CD13 expressing mature B-cell lymphoma.