We report a case of extramedullary plasmacytoma arising in the tongue. A 79-year-old man with a localized indurative white spot on the tongue was referred to our hospital for consultation. After making a clinical diagnosis of a tongue tumor, the lesion was completely excised. Histological and immunohistochemical examinations confirmed the diagnosis of an IgG-κ type of extramedually plasmacytoma. A general examination showed no evidence of multiple myeloma. The postoperative course was uneventful, with no signs of recurrence or progression to multiple myeloma.
