Abstract

Primary cutaneous plasmacytosis is a rare neoplasm of unknown etiology characterized by brown to red macules, papules, or plaques primarily of the trunk, neck, or face in persons of east Asian ethnicity. These neoplasms commonly infiltrate extracutaneous sites coining the name, cutaneous and systemic plasmacytosis. Histologically, cutaneous plasmacytic lesions show perivascular polyclonal proliferations of plasma cells, sometimes with concomitant lymphoid aggregate or multinucleated giant cells. To our knowledge, there are 12 reported cases of cutaneous plasmacytosis in Caucasians, one of which is of the scalp. Further, there are no reported cases of cutaneous plasmacytosis cooccurring with chronic lymphocytic leukemia (CLL). To this degree, we report a rare presentation of cutaneous plasmacytosis of the scalp in a 61-year-old Caucasian male with coexisting CLL and suspected leukemia cutis.

Financial Disclosure:
No current or relevant financial relationships exist.