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Image Description

Splenic Marginal Zone Lymphoma (SMZL) - Peripheral Blood Involvement: Bone marrow is involved in virtually all cases of SMZL, whereas peripheral blood involvement is seen in 55-65% of cases. A small number of neoplastic lymphocytes with villous morphology are commonly seen in peripheral blood smears.

The villi in SMZL are seen in only a subset of lymphocytes and consist of short cytoplasmic projections, often localized to one pole of the cell. In contrast, the villi in Hairy Cell Leukemia are longer and located circumferentially.

Image courtesy of: Sanam Loghavi, MD (@sanamloghavi); used with permission.

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