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Dermatology Online Journal

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Primary cutaneous plasmacytosis in a woman with previously undiagnosed celiac disease

Abstract

Cutaneous plasmacytosis has <60 cases worldwide, typically characterized by multiple asymmetric facial and truncal cutaneous nodules and plaques. We describe the case of a 68-year-old woman with erythematous plaques on the feet who had a biopsy showing primary cutaneous plasmacytosis and subsequent workup revealing celiac disease. Our patient's clinical presentation of symmetric plaques on the dorsal feet is previously unreported. Additionally, plasmacytosis occurs predominantly in Japanese patients and men younger than 40. Cutaneous plasmacytosis is hypothesized to be reactive from overreaction to stimuli including trauma, infections, or malignancies. The origin of our patient's reactive process could be related to celiac disease or could be unknown. Plasmacytosis in bone marrow has been reported with celiac disease, but to our knowledge, this is the first report of cutaneous plasmacytosis in a patient with celiac disease.

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