Multiple breast masses in a case of multiple myeloma

Myeloma of the breast is a rare entity with only a few reported cases in the literature. It is usually secondary to adjacent bone disease with only a few instances of primary involvement of the breast. We present a rare case of plasmacytoma of left humerus that presented with multiple breast masses and skin nodules. Histopathology of the breast and skin nodules showed plasma cells consistent with the diagnosis of multiple myeloma.