title: Plasmacytoma of the lung. A case report describing two tumors of different immunologic type in a single patient.
abstract: Two pulmonary plasmacytomas of different immunologic type, occurring with an interval of 5 years in the same 65-year-old woman are reported. Both displayed identical light chain types, but different heavy chains. The immunoperoxidase staining technique was used. The patient underwent segmental resection, and no evidence of recurrence or multiple myeloma was found 4 years later. Differential diagnoses are discussed, and the importance of immunologic staining is stressed.
mesh_terms: D000368:Aged; D005260:Female; D006801:Humans; D007124:Immunoenzyme Techniques; D008175:Lung Neoplasms / Q000175:diagnosis* / Q000000981:diagnostic imaging / Q000473:pathology; D008854:Microscopy, Electron; D009378:Neoplasms, Multiple Primary / Q000175:diagnosis*; D010954:Plasmacytoma / Q000175:diagnosis* / Q000000981:diagnostic imaging / Q000473:pathology; D011859:Radiography