原发性胃EBV阳性细胞毒分子阴性T细胞淋巴瘤与TET2多击突变:一个病例报告
Masako Kurashige1, Akihisa Hino2, Koki Muto1
1Department of Pathology, Graduate School of Medicine, The University of Osaka, Suita, Osaka, Japan.
Journal of clinical and experimental hematopathology : JCEH
|January 21, 2026
概括
本案例研究呈现了一种罕见的艾普斯坦-巴尔病毒 (EBV) 阳性胃T细胞淋巴瘤,缺乏细胞毒性分子,挑战了当前的淋巴瘤分类. 需要进一步的研究来完善这种独特的EBV相关的T细胞恶性瘤的诊断和治疗.
科学领域:
- 血液学和瘤学研究
- 免疫学 免疫学 免疫学
- 病理学 病理学 病理学
背景情况:
- 外节NK/T细胞淋巴瘤 (ENKTL) 被定义为埃普斯坦-巴尔病毒 (EBV) 阳性,起源于NK或细胞毒性T细胞系.
- 世界卫生组织血液淋巴瘤分类,第五版 (WHO-HAEM5) 排除了EBV阳性病例缺乏细胞毒性分子从ENKTL分类.
- 在理解和分类不表达细胞毒性分子的EBV阳性T细胞淋巴瘤方面存在重大差距.
研究的目的:
- 为了记录和描述一种罕见的初级胃EBV阳性T细胞淋巴瘤缺乏细胞毒性分子表达的罕见病例.
- 为了研究这种独特的淋巴瘤亚型的分子病变发生.
- 讨论对当前WHO-HAEM5分类和潜在治疗策略的影响.
主要方法:
- 组织病理学检查的瘤活检从一个病人胃和十二指肠的参与.
- 使用流细胞计和免疫组织化学进行免疫原型鉴定 (CD3,TCRβF1,CD4,CD56,TIA-1,B粒酶,穿孔素,PD-L1).
- 在EBV编码RNA (EBER) 的实地杂交.
- 针对性基因测序以识别遗传突变.
主要成果:
- 活检显示小到中型的非典型T细胞具有特定的形态特征和血管内透.
- 瘤细胞表达了CD3,TCRβF1和CD4,但缺乏CD56,TIA-1,大酶B,穿孔素和PD-L1,具有EBER阳性.
- 这些发现不符合ENKTL或PTCL的WHO-HAEM5标准,NOS.
- 向测序揭示了TET2突变,表明与克隆性血液形成有联系.
结论:
- 该病例代表了第一个记录的初级胃EBV阳性T细胞淋巴瘤缺乏细胞毒性分子表达,扩大了EBV相关的淋巴瘤瘤的谱.
- 观察到的TET2突变表明,克隆性血液形成在这种实体的发病过程中可能发挥作用.
- 淋巴瘤分类和管理策略的完善是有必要的,需要进一步调查类似的病例.
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