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(18-P2-14) 58歳女性が右結膜の腫瘤を主訴として受診した。摘出した腫瘤は,組織学的にび漫性中細胞型悪性リンパ腫と診断された。免疫組織化学的には抗モノクローナル抗体陽性で,サザンプロツティング法による分子生物学的検索で,免疫グロブリン遺伝子の再構成がJHプローブで認められ,単クロール性増殖が確認された。全身的には異常がなかった。中細胞型び漫性B細胞性の結膜に原発した悪性リンパ腫と診断が確定した。放射線照射と化学療法で腫瘍は縮小し,以後の1年間に局所再発と転移はない。
A 58-year-old woman presented with a tumor in her right eye. It was histologically diagnosed as diffuse malignant lymphoma of midium- sized cell type. Immunohistochemically, the tumor cells were positive for antimonoclonal antibody. Molecular biological analysis by Southern blot hydridization showed rearrangement of the bands of immunoglobulin heavy chain gene suggestive of monoclonal proliferation. No systemic abnormalities were present. The tumor was diagnosed as primary malignant lymphoma of medium-sized B cell type. Surgical excision, radiation and chemotherapy resulted in decrease of the tumor. There has been no local recurrence or metastasis during the one year's follow up.
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