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No abstract

Plasmablastic lymphoma (PBL) is a very rare and recently-described subtype of diffuse large B-cell lymphoma. A maxillary tumor in an 84-year-old HIV-negative Japanese-man was referred. The biopsied specimen showed a diffuse proliferation of mature plasma cells, expressing CD3 (+), CD4 (+), CD20 (-), CD138 (+) and EBER (+) by immunohistochemistry. He was diagnosed as a plasmablastic lymphoma; radiation therapy (RT) was started, but the response to the RT was only a partial response. To our knowledge, this is the first report of a patient with PBL expressing CD3 and CD4.

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The use of S-1 at 80 mg/m(2) per day in a split-course with 1-week rest during the course of radiation therapy was safe and effective for Stage II glottic cancer. The treatment strategy employing orally available S-1 proved to be beneficial over the conventional injection of antitumor agents for maintaining the patients' quality of life.