Intertriginous plasmacytosis with plasmoacanthoma: report of a typical case and review of the literature.

Clinical manifestations of benign (reactive) plasma cell proliferations of the skin and mucosa consist of a relatively rare and distinct group in dermatologic disorders. They have generally been named according to their localization. We report a typical case of mucocutaneous plasmacytosis located on intertriginous areas of the skin as well as mucosa with a perianal tumoral mass diagnosed as plasmoacanthoma. To our knowledge, this is the first detailed case report, at least in English literature.