Plasmacytoma of the larynx.

Plasmacytoma of the larynx is rare; thirty-one cases are reported in the literature and in this paper a further case is presented. The difficulty in diagnosing plasmacytoma is mentioned. Investigations to exclude multiple myeloma are mandatory to be sure that the disease is a localized lesion. Treatment of a localized lesion is essentially by radiotherapy but in the case of widespread or systemic disease, chemotherapy is recommended. A scoring system utilizing different parameters is suggested to decide whether the case has passed the borderline between local and systemic disease, a line which is invariably difficult to define.