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要旨 胃に原発したT細胞性リンパ腫の1例を経験し,免疫抗体法およびフローサイトメトリー(FCM)による検索を行ったので報告する.患者は72歳の女性で,食欲不振,嘔気,体重減少を主症状として来院し,胃生検でT細胞性リンパ腫と診断され,胃全摘術を受けた.抗human T-cell leukemia virus typeⅠ(HTLV-Ⅰ)抗体は陰性であった.肉眼的には大彎側に形成された周堤の低い浅い巨大潰瘍を中心とし,その周囲の皺襞の肥厚から成るリンパ腫で,組織学的および免疫組織化学的にはT細胞性びまん性大細胞型リンパ腫と診断した.FCMによる検索でも腫瘍細胞はCD2,CD3,CD4,CD5,CD38などのT細胞抗原が陽性であった.
A 72-year-old woman, who was sero-negative for human lymphotropic virus type Ⅰ and had a 2-month history of appetite-loss, nausea, and weight loss. After gastroendoscopical biopsy specimen revealed T-cell lymphoma, a total gastrectomy was performed. Grossly, the lymphoma showed slightly hypertrophic rugae with a large shallow ulcer on the greater curvature. Histopathologically and immunohistologically, the tumor was diagnosed as T-cell lymphoma, diffuse, large cell type. Tumor tissue of the resected stomach was used for cell surface marker analysis by flow cytometry. The tumor cells were positive for T-cell antigens, such as CD2, CD3, CD4, CD5, and CD38.
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