Hairy cell leukemia

In successful aspiration biopsies marrow smears may show abundant hairy cells admixed with other marrow elements. In this image numerous hairy cells are seen which are larger than normal small lymphocytes. A nucleated erythrocyte is also shown. Note the presence of abundant pale cytoplasm and “fuzzy” and hairy border in HCL cells.

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Histopathology images of Hairy cell leukemia, bone marrow

Source: PathPedia.com: Pathology e-Atlas