Peripheral Blood Cell Morphology

Case: 14 years old girl from Italy has fatique, fewer and chills. Her muscles are aching and her throat is shore. Basic blood count shows leukocytosis and mild anemia (Hb 115 g/L). Blood smear findings are in the image.

Can you identify these two cells (A & B)?

CORRECT ANSWER: Both cells (A and B) are reactive lymphocytes. These cells have basophilic cytoplasm but retain the "clumped" nuclear chromatin pattern characteristic of lymphocytes.
This patien has EBV mononucleosis.

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