A Case of Histiocytoid Sweet Syndrome Developed in the Patient with Pure White Cell Aplasia / 대한피부과학회지

ABSTRACT

Histiocytoid Sweet syndrome (HSS) is a rare inflammatory disease that has recently been described as a variant of Sweet syndrome. Histopathologically, HSS is characterized by papillary dermal edema with infiltration of histiocytoid cells into the upper dermis. The histiocytoid cells are easily misinterpreted as histiocyte, but in fact, they are immature myeloid cells. To demonstrate cells of myeloid lineage, specific staining must be performed, such as myeloperoxidase (MPO). To date, there are several HSS cases associated with hematological malignancy, drugs, and chronic inflammatory diseases. But, in Korea, only one case has been reported so far. Herein, we report a case of HSS developed in the patient with pure white cell aplasia and review the relevant literature.