Submitted by Ahmad Alkhasawneh

Atypical lymphocytes on blood smear

62-year-old woman admitted to the hospital with severe pneumonia and found to have leukocytosis with atypical lymphocytes/ monocytes on blood smear. CBC result, representative cells from differential and representative bone marrow are provided. Work up (including immunohistochemistry on tissue, flow cytometry, karyotype, FISH, and molecular), morphology guide for blood smear and flow cytometry guide are available under "specials to order".