MONG the features of infectious lymphadenosis (‘ ‘mononucleosis’ ‘) which help to distinguish it from acute lymphatic leukemia is the lack of reduction in both red cells and platelets. Conversely, the association of well-defined anemia and/or thrombocytopenia with a marked degree of lymphocytosis in which abnormal lymphocytes are conspicuous, almost certainly indicates acute leukemia. The prese...