title: Extramedullary plasmacytoma of the oropharynx producing kappa-type Bence-Jonas protein.
abstract: A case of extramedullary plasmacytoma in the oropharynx of a 41 year-old woman is reported. Histologically, the tumor was plasmacytoma consisting mainly of matured plasma cells and showing a deposit of amyloid in the interstitial structure. Immunoelectrophoretic studies of the concentrated urine specimen revealed a kappa-type Bence-Jones protein even though there was no increase in blood M-protein. Lineac electron radiation of 5,100 rad was given over a period of eight weeks but no effect was noted. After the tumor was surgically removed, follow up of the patient was made for 2 years without evidence of recurrence or metastasis.
mesh_terms: D000328:Adult; D001536:Bence Jones Protein / Q000096:biosynthesis*; D005260:Female; D006801:Humans; D007122:Immunoelectrophoresis; D009960:Oropharynx; D010610:Pharyngeal Neoplasms / Q000378:metabolism* / Q000473:pathology; D010950:Plasma Cells / Q000473:pathology; D010954:Plasmacytoma / Q000378:metabolism* / Q000473:pathology
chemical_list: D001536:Bence Jones Protein