摘要目的:探讨韦氏环伴滤泡辅助T细胞表型的外周T细胞淋巴瘤（wPTCL-TFH）临床病理学及遗传学特点，并与结内伴滤泡辅助T细胞表型的外周T细胞淋巴瘤（nPTCL-TFH）和血管免疫母细胞性T细胞淋巴瘤（AITL）对比分析，以加深对该少见肿瘤的认识。方法:收集郑州大学第一附属医院2015年12月至2019年4月诊断的wPTCL-TFH 8例，分析其临床资料，观察形态学、免疫组织化学、EB病毒编码的RNA（EBER）原位杂交及T细胞受体（TCR）基因重排检测（BIOMED2法）情况，并用Sanger测序法检测IDH2 R172基因突变情况，最后通过电话随访患者。 结果:患者男性6例，女性2例，中位年龄62.5岁（年龄范围30~75岁），临床均无发热及皮疹，PET-CT/CT均表现为韦氏环部位黏膜增厚或肿块伴多发淋巴结肿大，5/7例处于进展期（Ⅲ/Ⅳ期）；光镜下特征性的表现为黏膜内单一的小-中等大淋巴细胞弥漫浸润，缺乏多形性炎性细胞背景及滤泡外滤泡树突细胞网（FDC网）的增生，5例可见胞质透明T细胞；多数黏膜表面伴有溃疡（6例）及局部-广泛的黏膜内腺体消失（7例）；2例见上皮样组织细胞构成的肉芽肿结构；免疫组织化学：肿瘤细胞均表达CD4及2种或2种以上滤泡辅助T细胞标志物：PD-1（8/8）、bcl-6（8/8）、CXCL13（7/8）及CD10（1/8）；6例CD30阳性；4例EBER原位杂交阳性；8例TCR基因均呈单克隆性重排；6例IDH2 R172基因均未见突变。1例患者在随访18个月时死亡，其余7例存活（随访时间3~10个月不等）。 结论:wPTCL-TFH少见，其临床病理学特征与nPTCL-TFH相似，与AITL有部分重叠；有必要将其从外周T细胞淋巴瘤，非特指型中鉴别出来；综合临床、形态、免疫组织化学及基因检测可明确诊断。

abstractsObjective:To study the clinicopathologic and genetic features of Waldeyer′s ring peripheral T-cell lymphoma with follicular helper T cell immunophenotypes (wPTCL-TFH), with comparison to the nodal peripheral T-cell lymphoma with TFH immunophenotypes (nPTCL-TFH) and angioimmunoblastic T-cell lymphoma (AITL), as to know this rare tumor better.Methods:The clinical data, histopathology features, EBV positivity, T cell clonality and IDH2 R172 gene mutation in 8 cases of wPTCL-TFH were collected at the First Affiliated Hospital of Zhengzhou University from December 2015 to April 2019, and analyzed by immunohistochemistry, in situ hybridization, TCR gene rearrangement (BIOMED-2) and Sanger sequencing.Follow-up data were obtained by telephone. Results:There were 6 males and 2 females with a median age of 62.5 years (age ranging from 30 to 75 years). All patients had neither fever nor skin manifestations, but were all found mucosa thickened or mass of waldeyer′s ring with multiple lymph nodes enlarged by PET-CT/CT scans. Five of the 7 patients were at advanced stages (Ⅲ/Ⅳ stage). Microscopically, the mucosa was infiltrated diffusely and characteristically by numerous small-medium sized lymphocytes, lacking polymorphous inflammatory background and extra-follicular expansion of follicular dendritic cell networks (FDC networks). The clear T cells presented in 5 cases. Ulcers on mucosal surfaces (6 cases) and local-extensive loss of intramucosal glands (7 cases) were commonly noted. Granulomas composed of epithelioid histiocytes were observed in 2 cases. Immunohistochemically, all the tumor cells expressed CD4 and at least 2 types of follicular helper of T cell (TFH) markers: PD-1 (8/8), bcl-6 (8/8), CXCL13 (7/8) and CD10 (1/8). Most of the cases (6 cases) expressed CD30. EBV positive appeared in 4 cases. All 8 cases were T cell monoclonal. IDH2 R172 were wild-type in 6 cases. One patient died at the follow-up time on 18 months; the other 7 survived (the follow-up time varied from 3 to 10 months). Conclusions:wPTCL-TFH is rare, and its clinicopathological features are similar to nPTCL-TFH which may be the manifestation of the same disease at different stage, and partly overlapped with AITL. The differential diagnosis from PTCL-NOS is necessary and comprehensive analyses of clinical, morphological, immunohistochemical and genetic features can help make a correct diagnosis.