Hematology

Atypical Mononuclear Cells in Infectious Mononucleosis

Morphological features of atypical mononuclear cells (reactive lymphocytes) in peripheral blood smears in infectious mononucleosis.

Blood smear: atypical mononuclear cells with broad basophilic cytoplasm
Blood smear: atypical mononuclear cells with broad basophilic cytoplasm

Atypical mononuclear cells in infectious mononucleosis. Source: Lugovskaya S.A. Pochtar M.E. - Hematological Atlas 3rd ed., 2011