Examples of reactive lymphocytes

The top row is from a patient with infectious mononucleosis and represents Downey type II cells. The middle row shows examples of large granular lymphocytes. The bottom left is a reactive lymphocyte with immunoblastic features (Downey type III cell), the bottom middle shows a plasmacytoid lymphocyte, and the bottom right is an example of a Downey type I cell. All images: Giemsa stain, 100X.