A 63-year-old woman presented to our hospital with fever, purpura and pain in both legs and died 4 days after admission. Her blood smear and skin biopsy showed cylinder-like bodies (20×120 μm). She was diagnosed to have monoclonal gammopathy (IgG, lambda type). An autopsy revealed cylinder-like bodies in the vasculature of various organs. We noted a proliferation of atypical plasma cells in her bone marrow, suggesting pre-existing myeloma. Crystalglobulinemia is a rare manifestation of hypergammaglobulinemia that can cause multiple embolisms of the small vessels, and this resulted in the patient's fulminant course. The identification of cylinder-like bodies in the peripheral blood may help in reaching a diagnosis in such cases.
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