Lymphoid leukocytosis. (A) Infectious mononucleosis with a reactive lymphocytosis including an immunoblast at top. Note the pleomorphism of the lymphocytes. (B) A reactive lymphocytosis is seen in this patient with massive trauma due to a vehicular accident. (C) Large granular lymphocytosis, reactive. (D) CLL with characteristic small, round lymphocytes containing coarse, blocky chromatin. (E) Prolymphocytoid transformation in CLL. (F) Splenic marginal zone lymphoma with villous lymphocytes containing bipolar cytoplasmic projections. (G) Blastic MCL. (H) Lymphoplasmacytic lymphoma. (I) Circulating follicular lymphoma with clefted lymphoma cells.