A malignant nasal polyp. A clinically surprising plasmacytoma.

In conclusion, this is a study of a 52-year-old white male who had the removal of a benign appearing nasal polyp with the surprising diagnosis of extramedullary plasmacytoma. The clinical course has been completely benign since surgery for over two years. This should alert physicians to the possibility that benign appearing polyps, on rare occasion, can be malignant, and particularly those polyps occurring on the septum should be carefully investigated. It happened that this patient had a plasmacytoma, and a search for the presence of multiple myeloma is warranted.