消化系统疾病诊治与组织病理诊断密切相关,高效、规范获取组织样本是关键,对此2021年欧洲胃肠内镜学会制定了消化道及肝胰腺胆道的内镜下组织活检的指南,分为上消化道（含肝、胰腺、胆道）和下消化道两部分,提供了规范活检的指导及建议。笔者对指南就上消化道内镜下组织活检的部分内容进行解读,解读内容为个人观点。

The diagnosis and treatment of digestive system diseases are closely related to histopathological diagnosis．Efficient and standardized acquisition of tissue samples plays a key role．In 2021,European Society of Gastrointestinal Endoscopy（ESGE）had developed guidelines for endoscopic tissue biopsy of the digestive tract and hepatopancreatic biliary tract,which divided into upper gastrointestinal tract（including liver,pancreas,biliary tract）and lower gastrointestinal tract．This guideline provided guidance and recommendations for standardizing biopsies．We interprets some of the contents of the guideline on tissue biopsy under endoscopy of the upper gastrointestinal tract,which are personal opinions．

自身免疫性肝炎（AIH）是由不明原因免疫异常引起的急性或慢性肝脏炎症性疾病,不分年龄或性别,影响所有种族群体。AIH如果没有得到及时的治疗,可能会发展为肝硬化、肝衰竭,甚至导致死亡。目前一些诊断评分系统和肝活组织病理检查已成为诊断的标准,然而由于疾病表现的高度异质性,AIH诊断仍很有挑战性。大多数患者最初对一线治疗（糖皮质激素与硫唑嘌呤的联合治疗）有应答,然而,应答欠佳和因不良反应引起的不耐受也不少见,需要二线和（或）三线治疗。本文总结阐述诊断困难、一线药物治疗应答欠佳或不耐受的疑难AIH诊断和管理的最新进展,并归纳了目前国内外关于AIH治疗的新方法,为AIH的临床诊疗提供参考。

Autoimmune hepatitis（AIH）is an acute or chronic inflammatory disease of liver caused by unclear immune response that affects people from all ethnic groups irrespective of age or sex．If left untreated,AIH will lead to cirrhosis,liver failure,or death．A number of diagnostic scoring systems and histopathological examination of liver biopsies are now the standard for diagnosis．However,due to the high heterogeneity of the disease presentation,AIH diagnosing remains challenging．Most patients initially respond to first-line treatment,which is corticosteroids combined with azathioprine．However,insufficient response and intolerance due to side effects are also common,so some patients requires second-and/or third-line therapies．Here we summarized the latest progress in diagnosis and management of AIH with difficult diagnosis,poor response to first-line drug treatment or intolerance,as well as the new methods of AIH treatment worldwide,to provide reference for the clinical diagnosis and treatment of AIH．

目的 粪菌移植(fecal microbiota transplantation,FMT)是治疗疾病的新途径,本文总结我院408例(1 085例次)FMT的临床疗效和安全性。FMT治疗艰难梭菌感染有效率达80%,抗生素相关性腹泻68%,炎症性肠病52%,功能性肠病65%,代谢性疾病50%,其他疾病57%,安全性良好,未见严重不良事件发生,结果和多数文献相符。还需更多随机对照试验才能明确FMT的临床价值。

目的 通过生物信息分析途径,从分子水平揭示非酒精性脂肪性肝病（NAFLD）的发病发展机制,为NAFLD研究提供新的思路。方法 从公共数据库GEO中下载NAFLD相关的基因芯片数据GSE48452,利用Transcriptome Analysis Console软件筛选差异表达基因,FunRich软件和STRING在线分析工具对差异基因进行下一步的生物信息学分析。结果 正常组与NAFLD组差异基因52个,正常组与非酒精性脂肪性肝炎（NASH）基因64个,共同差异基因15个。这些差异表达基因参与脂质转运、胆汁酸合成、脂质和脂蛋白代谢、生物氧化等过程。通过通路分析及蛋白质相互作用分析进一步筛选出与NAFLD发病发展密切相关的18个差异表达基因。结论 通过生物信息学分析筛选出MSN、CDC45、ANXA5、PIK3CG和DTL基因可能为研究乃至阻断NAFLD发展进程的重要靶点,需进一步验证。

Objective To explore the molecular mechanism of nonalcoholic fatty liver disease （NAFLD） with bioinformatics analysis. Methods The microarray data of NAFLD were downloaded from the Gene Expression Omnibus （GEO） database and analyzed using Transcriptome Analysis Console （TAC） for screening differentially expressed genes. The further analysis of differentially expressed genes was conducted by FunRich software and the online tool STRING. Results For the comparison of control group vs. NAFLD group,52 genes have differentially expressed,while control groups vs. nonalcoholic steatohepatitis （NASH） group,64 genes have differentially expressed. 15 differentially expressed genes were found in both comparisons. These genes were involved in the biological pathway of lipid transport,bile acid biosynthesis,metabolism of lipids and lipoproteins and biological oxidations. With biological pathway analysis and protein-protein interaction analysis,18 differentially expressed genes were found closely associated with the progression of NAFLD. Conclusion MSN、CDC45、ANXA5、PIK3CG and DTL may be the important target for study the progression of NAFLD,which needs a further study to confirm.

目的 探讨直肠神经内分泌肿瘤的临床病理特征。方法 回顾性分析46例直肠神经内分泌肿瘤患者的临床病理资料,对不同病理分级的患者在性别、年龄、肿瘤直径、浸润深度、肝及淋巴结转移等方面进行比较。结果 直肠神经内分泌肿瘤男性多见,肿瘤多位于直肠中下段。免疫组化检测显示CgA、Syn、CD56阳性率分别为40.0%、97.8%、100%。36例Ki-67阳性指数≤2％,6例Ki-67阳性指数在3％～20％,4例Ki-67阳性指数＞20％。不同病理分级的肿瘤与患者年龄、肿瘤直径、浸润深度、淋巴结及肝转移相关,与性别不相关。结论 直肠神经内分泌肿瘤缺乏临床特异性症状,联合CgA、Syn和CD56染色可提高直肠神经内分泌肿瘤的诊断率。病理分级对预测肿瘤浸润深度、肝或淋巴结转移有重要参考价值。

Objective To investigate the pathological and clinical significance of 46 cases of rectal neuroendocrine tumors(NET). Methods Retrospectively analyzed the clinical and pathological feature of 46 patients with rectal NET, and assessed possible interactions between different pathological grades and gender, age, tumor diameter, depth of invasion, lymph node and liver metastasis. Results Rectal NET appeared more frequently in males than in females. Most tumors located in middle and distal third of rectum. The positivity rates of immunohistochemical marker CgA, Syn, CD56 were 40.0%, 97.8%, 100.0%, respectively. The cases of Ki-67 positivity rate under 2%, ranged between 3%-20%, above 20% were 36, 6, 4, respectively. Different pathological grades were significantly correlated with age, tumor diameter, depth of invasion, lymph node and liver metastasis, but not with gender. Conclusion Rectal NET had nonspecific symptoms. Combined immunohistochemical staining, such as CgA, Syn and CD56, was important in the evaluation of rectal NET. Pathological grading might be very useful for prediction of invasion depth, lymph node and liver metastasis.