Nasal T-cell lymphoma associated with double gammopathy (IgG and IgA) was found in a 78-year-old man with a necrotic tumor in his right nasal cavity. He was treated with radiotherapy and CVP chemotherapy but the lymphoma relapsed in his left nasal cavity 1 year later. He was treated again with the same therapy and is now alive and tumor-free.Two serum M-components (IgG and IgA) were detected through his clinical course. To our knowledge, this is the first report of T-cell lymphoma associated with double gammopathy. The significance of M-components in T-cell lymphocytic proliferation remains unclear, but it may be that the M-components appear because of the inappropriate regulation of the T-B immune-response system in the presence of T-cell lymphoma.Histology in this case is also noteworthy. The first nasal tumor showed granulation and necrotic tissue with plasma cell infiltration; it was diagnosed as non-Hodgkin diffuse lymphoma, mixed type, by surface marker analysis. This indicates that immunohistochemical study is indispensable for the diagnosis of nasal non-healing granuloma with necrosis.
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