Abstract
Background: Necrobiotic xanthogranuloma (NXG) with paraproteinemia is a distinctive palisading granuloma of the skin. Extracutaneous lesions are rarely present. Objective: The purpose of this study was to confirm the presence and significance of giant cell asteroid bodies and other cytoplasmic inclusions in NXG with paraproteinemia. Methods: Skin biopsy specimens from 24 patients with NXG with paraproteinemia were reviewed; autopsy and lung biopsy specimens from two patients were stained for iron, calcium, and polysaccharide. Results: Giant cell asteroid bodies were observed in skin biopsy specimens of 8 (33%) of the 24 patients. In addition, large acidophilic polygonal cytoplasmic inclusions were observed in myocardial tissue of one of the autopsy cases. Iron and calcium were not found. Conclusion: Asteroid bodies and other inclusions can be present in the giant cells of NXG with paraproteinemia. They are as frequent as, or more frequent than, in other granulomatous diseases and should be considered in the diagnosis of NXG with paraproteinemia.(J Am Acad Dermatol 1998;38:967-70.)
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