Submitted by Ahmad Alkhasawneh

Atypical cells on blood smear

66-year-old man with history of asthma, intermittent fever and borderline leukocytosis. CBC result, representative cells from differential and representative bone marrow are provided. Note: Subclassification is required. 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".