北京大学学报(医学版) ›› 2023, Vol. 55 ›› Issue (3): 521-529. doi: 10.19723/j.issn.1671-167X.2023.03.019
时云飞1,王豪杰2,刘卫平3,米岚3,龙孟平1,刘雁飞3,赖玉梅1,周立新1,刁新婷1,李向红1,*()
Yun-fei SHI1,Hao-jie WANG2,Wei-ping LIU3,Lan MI3,Meng-ping LONG1,Yan-fei LIU3,Yu-mei LAI1,Li-xin ZHOU1,Xin-ting DIAO1,Xiang-hong LI1,*()
摘要:
目的: 分析血管免疫母细胞性T细胞淋巴瘤(angioimmunoblastic T-cell lymphoma,AITL)病理学特征、基因改变及预后的影响因素。方法: 选择北京大学肿瘤医院病理科2007年6月至2021年11月明确诊断且有完整随访信息的AITL患者病例资料进行回顾性分析,对病例进行形态学分型[Ⅰ型:淋巴结反应性增生(lymphoid tissue reactive hyperplasia,LRH)样;Ⅱ型:边缘区淋巴瘤(marginal zone lymphoma,MZL)样;Ⅲ型:外周T细胞淋巴瘤非特指型(peripheral T-cell lymphoma, not specified,PTCL-NOS)样]。结合免疫组化染色评估肿瘤有无滤泡辅助T细胞(follicular helper T cell,TFH)表型,生发中心(germinal center,GC)外滤泡树突细胞(follicular dendritic cells,FDC)增生,Hodgkin和Reed-Sternberg (HRS)样细胞及大B(细胞淋巴瘤)转化;计数每个高倍视野(high power field,HPF)Epstein-Barr病毒(Epstein-Barr virus,EBV)阳性细胞含量;按需要完善T细胞受体(T-cell receptor,TCR) / 免疫球蛋白(immunoglobulin,IG)基因重排检测和靶向外显子二代测序(targeted exome sequencing,TES)检测。结果: 共收集患者61例,形态分型Ⅰ型7例(11.4%)、Ⅱ型31例(50.8%)、Ⅲ型23例(37.8%),51例(83.6%)具有明确TFH表型,有不同程度GC外FDC网架增生(中位20.0%),14例(23.0%)有HRS样细胞,7例(11.5%)有大B转化。42.6%(26/61)的病例属于EBV高含量(>10个/HPF)。TCR/IG重排分析57.9%TCR+/IG-(11/19),26.3%TCR+/IG+(5/19),10.5%TCR-/IG-(2/19),5.3%TCR-/IG+(1/19)。TES检测RHOA突变66.7%(20/30),IDH2突变23.3%(7/30),TET2突变80.0%(24/30),DNMT3A突变33.3%(10/30)。TES检测30例患者分为(1)IDH2和RHOA共突变组(7例):Ⅱ型6例,Ⅲ型1例,具典型TFH表型,未见HRS细胞和大B转化;(2)单RHOA突变组(13例):Ⅰ型1例,Ⅱ型6例,Ⅲ型6例,不具典型TFH表型5例,伴HRS细胞6例,伴大B转化2例,TCR-/IG- 1例, TCR-/IG+ 1例,TCR+/IG+ 1例;(3)仅TET2和/或DNMT3A突变组(7例):Ⅱ型3例,Ⅲ型4例,均具典型TFH表型,伴HRS细胞2例,伴大B转化2例;(4)无突变组(3例),均为Ⅱ型,TFH表型典型,FDC网架增生,TCR-/IG- 1例。单因素生存分析证实EBV阳性细胞含量高为总生存和无进展生存的不良预后因素(P=0.017及P=0.046)。结论: AITL组织病理学难以诊断主要见于形态Ⅰ型,伴HRS样细胞,大B转化;此时TCR/IGH重排检测对诊断有帮助但价值有限;增加TES检测RHOA、IDH2、TET2、DNMT3A等基因突变可有效辅助AITL疑难病例的组织病理学诊断。肿瘤组织中EBV阳性细胞含量升高提示预后不良。
中图分类号:
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