Derm101.com, Dermatology Practical and Conceptual, 3(2), 2012
DOI: 10.5826/dpc.0203a03
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A patient with a history of non-diagnostic bone marrow biopsies presented with a red to brown maculopapular rash on the back. Biopsies confirmed multiple xanthogranulomas as well as a mastocytosis. A consequently performed bone marrow biopsy verified a systemic mastocytosis and a chronic myelomonocytic leukemia (CMML) type I.