Laterally spreading tumor-like primary rectal mucosa-associated lymphoid tissue lymphoma: A case report

BACKGROUNDColorectal mucosa-associated lymphoid tissue (MALT) lymphoma is a rare disease, and only a few cases have been reported to date. It has no specific clinical presentations and shows various endoscopic appearances. There is no uniform consensus on its treatment. With the advancement of endoscopic technology, endoscopic treatment has achieved better results in individual case reports of early-stage patients.CASE SUMMARYWe report a case of rectal MALT in a 57-year-old Chinese man with no symptoms who received endoscopy as part of a routine physical examination, which incidentally found a 25 mm × 20 mm, laterally spreading tumor (LST)-like elevated lesion in the rectum. Therefore, he was referred to our hospital for further endoscopic treatment. Complete and curable removal of the tumor was performed by endoscopic submucosal dissection. We observed enlarged and dilated branch-like vessels similar to those of gastric MALT lymphoma on magnifying endoscopy with narrow-band imaging. And immunopathological staining showed hyperplastic capillaries in the mucosa. Histopathological findings revealed diffusely hyperplastic lymphoid tissue in the lamina propria, with a visible lymphoid follicle structure surrounded by a large number of diffusely infiltrated lymphoid cells that had a relatively simple morphology and clear cytoplasm. In addition, immunohistochemical analysis suggested strongly positive expression for CD20 and Bcl-2. Gene rearrangement results showed positivity for IGH-A, IGH-C, IGK-B, and IGL. Taking all the above findings together, we arrived at a diagnosis of extranodal marginal zone B-cell lymphoma of MALT lymphoma. Positron emission tomography-computed tomography examination showed no other lesions involved. The patient will be followed by periodic endoscopic observation.CONCLUSIONIn conclusion, we report a case of rectal MALT with an LST-like appearance treated by endoscopic submucosal dissection. Further studies will be needed to explore the clinical behavior, endoscopic appearance, and treatment of rectal MALT.     

Pancreatic cancer secondary to intraductal papillary mucinous neoplasm with collision between gastric cancer and B-cell lymphoma: A case report

BACKGROUNDPatients with intraductal papillary mucinous neoplasm (IPMN) have an increased risk of pancreatic and extrapancreatic malignancies. Lymphomas are rare extrapancreatic malignancies, and in situ collisions of early gastric cancer and diffuse large B-cell lymphoma (DLBCL) are even rarer. Here, we report the first case of pancreatic cancer comorbid with in situ collision of extrapancreatic malignancies (early gastric cancer and DLBCL) in a follow-up IPMN patient. Furthermore, we have made innovations in the treatment of such cases.CASE SUMMARYAn 81-year-old Japanese female diagnosed with IPMN developed elevated carbohydrate antigen (CA) 19-9 levels during follow-up. Because her CA19-9 levels continued to rise, endoscopic ultrasound (EUS) was performed and revealed a suspicious lesion at the pancreatic tail. However, lesions in the pancreas were not found by computed tomography, magnetic resonance imaging, or endoscopic retrograde cholangiopancreatography. To make an exact patho-logical diagnosis, EUS-guided fine needle aspiration was performed. To our supprise, early gastric cancer was found in preoperative gastroscopy. The gastric cancer was completely resected through endoscopic submucosal dissection before postoperative pathology identified early adenocarcinoma collided with DLBCL. Subsequent EUS-guided fine needle aspiration provided pathological support for the pancreatic cancer diagnosis, and then laparoscopic distal pancreatectomy and splenectomy were performed. CA19-9 levels returned to normal postoperatively. CONCLUSIONEndoscopic submucosal dissection is appropriate for submucosal lymphomas in patients intoleratant of chemotherapy. EUS can detect small IPMN-related pancreatic tumors.     

Résection endoscopique des tumeurs sous-muqueuses gastriques de petite taille

Subepithelial tumors (SETs) in the stomach are usually found incidentally during endoscopic examinations. Most gastric SETs are asymptomic and are formerly considered to have a benign nature, such as lipomas, shwannomas, leiymyomas. However, several gastric SETs have malignant potential, especially when they originate from the muscularis propria layer such as gastrointestinal stromal tumors or neuroendocrine tumors. SETs diagnostic is challenging, even after endoscopic ultrasound evaluation and biopsies. Thus, gastric SETs resection is justified because it provides histological analysis and curative treatment. For small gastric SETs (<2 cm), endoscopic resection is promising and associated with lower morbi-mortality comparatively to surgery. Resection techniques are close from endoscopic submucosal dissection, such as submucosal tunneling endoscopic resection or endoscopic full thickness resection. Some studies reported that complete resection rate was superior to 90% with low recurrence rates ranging from 0 to 2%. Severe adverse event occurrence (massive bleeding, perforation and pneumothorax) is rare. However, these promising results have to be confirmed in larger studies and with long term follow-up.     

Combined laparoscopic-endoscopic approach for gastric glomus tumor: A case report

BACKGROUNDGastric glomus tumor (GGT) is rare submucosal mesenchymal tumor that lacks specific clinical manifestations and is usually treated mainly by traditional surgical resection. This paper presents a case of a GGT, exhibited both intraluminally and extraluminally growth that was removed by laparoscopy-gastroscopy cooperative surgery.CASE SUMMARYA 52-year-old male presented with epigastric discomfort accompanied by a sense of fullness for 3 mo. Upper gastrointestinal endoscopy identified a submucosal lump located in the gastric antrum. Endoscopic ultrasonography identified a 2.4 cm × 1.8 cm lump located in the gastric antrum. It originated from the muscularis propria and exhibited both intraluminally and extraluminally growth, with hypoechoicity on the periphery, hyperechoicity in the middle, and unclear boundaries. Computed tomography showed nodular thickening of 3.0 cm × 2.2 cm in the gastric wall of the gastric antrum, and after enhancement, the lesion exhibited obvious enhancement We suspected that it was a gastrointestinal stromal tumor (glomus tumor and schwannoma were not excluded) and planned to perform laparoscopy-gastroscopy cooperative surgery. Immunohistochemical staining after the operation revealed that spinal muscular atrophy (+), h-caldesmon (+), cluster of differentiation 34 (CD34) (+), 2% Ki-67-positive rate, CD56, melanoma antigen, CD117, discovered on GIST-1, leukocyte common antigen, caudal type homeobox 2, cytokeratin, and S-100 were all negative. The tumor was finally diagnosed as a GGT.CONCLUSIONGGTs are rare submucosal tumors of the stomach and should be considered in the differential diagnosis of gastric submucosal tumors. Laparoscopy-gastroscopy cooperative surgery is less invasive and more precise and could be an effective method for the treatment of GGTs.     

经胃镜治疗胃黏膜下肿瘤61例临床分析

目的分析胃黏膜下肿瘤的临床病理学特征,评价经内镜治疗胃黏膜下肿瘤的安全性及有效性。方法通过胃镜及超声内镜筛选出2012年9月-2014年6月共61例患有胃黏膜下肿瘤的患者;均采用经胃镜治疗方案予以切除;切除肿瘤术后均送病理学检查,可疑胃间质瘤进一步行免疫组化等分子生物学检查。结果 61例患者中,有39例为女性患者,占总病例63.93%,肿瘤位于胃底占52.46%(32/61),胃体21.31%(13/61),胃窦11.48%(7/61),贲门14.75%(9/61);10例行内镜黏膜剥离术(ESD),21例行内镜黏膜下挖除术(ESE),27例行内镜全层切除术治疗(EFR),3例经黏膜下隧道肿瘤切除术治疗(STER)。61例患者中,1例因瘤体过大且突破浆膜层,另1例位于胃底黏液湖操作困难故中转腹腔镜治疗,术后1例发生穿孔,经腹腔镜成功修补,1例发生出血,内镜下成功止血;病理学检查最后确诊胃间质瘤34例,危险度均为极低危(肿瘤每50个高倍镜视野下核分裂像≤5),平滑肌瘤11例、脂肪瘤5例、异位胰腺3例、钙化性纤维假瘤5例、炎性纤维性息肉2例和血管瘤样增生1例;胃间质瘤位于胃底73.53%(25/34),胃体11.76%(4/34),胃窦5.88%(2/34),贲门8.82%(3/34)。结论胃黏膜下肿瘤以女性多发,且多无特异性临床症状;胃黏膜下肿瘤好发于胃底,且以胃间质瘤多见;绝大部胃间质瘤风险分级为极低危;经胃镜治疗胃黏膜下肿瘤是微创、安全、有效的方法。     

Signet ring cell carcinoma hidden beneath large pedunculated colorectal polyp: A case report

BACKGROUNDLarge pedunculated colorectal polyps are not frequent among colonic polyps. We present a clinical case of a large pedunculated colorectal polyp with signet ring cell cancer infiltrating the submucosa and lymph node invasion in a patient who ultimately underwent additional surgery. Clinicians should attach importance to pedunculated colorectal polyps and choose the most appropriate therapy.CASE SUMMARYA 52-year-old female farmer underwent routine screening colonoscopy and denied constipation, diarrhea, hematochezia, or other gastrointestinal symptoms. Her past medical history and general biochemical examination results were unremarkable. During the colonoscopy, a 25-mm pedunculated polyp in the sigmoid colon was identified. The superficial epithelium was macroscopically congestive, rough, and granular, showing characteristic features of adenoma. We first ligated the root of the pedunculated polyp using nylon loops as well as a titanium clip. Histopathological examination revealed high-grade intraepithelial neoplasia of the tumor surface and a negative margin with signet ring cell adenocarcinoma infiltrating the submucosal layer. The deepest infiltration was approximately 0.9 cm from the tumor surface and 0.55 cm from the stratum basale. We performed radical resection of the left colon with lymph node dissection after two weeks. The lesion was completely resected, and pathological assessment revealed signet ring cell adenocarcinoma infiltrating the submucosal layer as well as lymph node invasion (stage PT1N1M0 and grade IIIA in pathological grading, NRAS-, BRAF V600E-, KRAS-).CONCLUSIONThis case highlights the importance of paying attention to the malignancy of large pedunculated polyps. Polyps or adenomas removed via endoscopy must be evaluated histologically. Even if adenomas may be fragile, endoscopy doctors should still remove polyps as completely as possible and choose perpendicular sections through the stalk and base to fix by formaldehyde solution.     

Esophageal superficial adenosquamous carcinoma resected by endoscopic submucosal dissection: A rare case report

BACKGROUNDAdenosquamous carcinoma (ASC), which is comprised of squamous cell carcinoma (SCC) and adenocarcinoma elements, is a rare histological type of esophageal carcinoma. Few reports have focused on the endoscopic findings and the effectiveness of the endoscopic treatment of early ASC.CASE SUMMARYA 77-year-old man underwent esophagogastroduodenoscopy for heartburn. A flat lesion with an uneven and slightly elevated central portion was found in the distal esophagus. Magnifying endoscopy with narrow-band imaging showed a well-demarcated brownish area with dendritically branched abnormal vessels and highly irregular intrapapillary capillary loops. A histopathological diagnosis of SCC was obtained by endoscopic biopsy. Endoscopic ultrasonography revealed a hypoechoic mass confined to the mucosa layer. The lesion was suspected to be SCC with invasion into the muscularis mucosa. The lesion was resected en bloc by endoscopic submucosal dissection and histologically diagnosed as esophageal ASC limited within the muscularis mucosa, which was completely resected without lymphovascular or neural invasion. The SCC element was the pre-dominant element. The adenocarcinoma element formed ductal and nested structures distributed in a focal pattern. The patient underwent only endoscopic submucosal dissection and has been under annual endoscopic and radiographic surveillance for 3 years without recurrence.CONCLUSIONFor early ASC confined within the mucosal layer, complete endoscopic resection might also be a curative treatment.     

消化道无蒂隆起性病变的内镜黏膜切除术和内镜黏膜下剥离术治疗分析

目的探讨内镜下粘膜切除术(EMR)和内镜粘膜下剥离术(ESD)治疗消化道无蒂隆起性病变包括早癌的疗效和安全性。方法对行EMR和ESD的43例消化道无蒂隆起性病变患者做回顾性分析。结果 43例无蒂隆起性病变食管11例,胃底4例,胃体8例,胃窦8例,贲门11例,直肠1例。EMR32例,ESD 11例。EMR病变长径、手术时间均明显低于ESD;EMR术后1例出血,无穿孔,ESD术后1例出血,2例穿孔,皆保守治疗后治愈。术后病理提示间质瘤6例,息肉23例,1例异位胰腺,7例上皮内瘤变,6例早癌。基底和切缘均未见病变累及。术后2月、6月随访,创面愈合,无病变残留和复发。结论 EMR和ESD治疗消化道无蒂隆起性病变安全有效,可以提供完整的病理诊断学资料。EMR和ESD可用于治疗消化道早癌。     

Endoscopic resection of benign esophageal schwannoma: Three case reports and review of literature

BACKGROUNDEsophageal schwannomas are uncommon esophageal submucosal benign tumors and are usually treated with surgery. CASE SUMMARYHere, we report three cases of middle/lower thoracic esophageal schwannoma treated successfully with endoscopic resection. These lesions were misdiagnosed as leiomyoma on preoperative imaging. During the endoscopic resection of such tumors, there is a risk of esophageal perforation due to their deep location. If possible, submucosal tunneling endoscopic resection should be used. CONCLUSIONFor larger schwannomas, endoscopy combined with thoracoscopy can be considered for en bloc resection. We performed a mini literature review in order to present the current status of diagnosis and treatment for esophageal schwannoma.     

Combined endoscopy/laparoscopy/percutaneous transhepatic biliary drainage,hybrid techniques in gastrointestinal and biliary diseases

In recent years, a wide range of gastrointestinal endoscopy techniques have been developed, such as endoscopic submucosal dissection (ESD) and endoscopic retrograde cholangiopancreatography (ERCP). Although ESD and ERCP have an important role in gastrointestinal and biliary diseases, each technique has its limitations. Hybrid techniques that combine endoscopic and surgical procedures have emerged that have the advantages of different procedures and negate their limitations at the same time. Laparoscopic endoscopic cooperative surgery and modified laparoscopic endoscopic cooperative surgery combine ESD and laparoscopic techniques to resect submucosal tumors with minimum resection area. Air leak test by intraoperative endoscopy can effectively identify a mechanically insufficient anastomosis and decrease the complication rate. The rendezvous technique that combines percutaneous transhepatic biliary drainage and endoscopy can be performed as a rescue approach for the treatment of biliary obstruction, stenosis and bile duct injuries. For patients with simultaneous presence of stones in the gallbladder and the common bile duct, the laparo-endoscopic rendezvous technique can perform ERCP and laparoscopic cholecystectomy at the same time and reduces the risk of pancreatic injury caused by ERCP. Biliobiliary and bilioenteric anastomosis using magnetic compression anastomosis is another choice for biliary obstruction. The most common used approach to deliver the magnets is by percutaneous-peroral tract. Laparoscopic-assisted ERCP is a safe and highly effective therapy for patients who develop biliary diseases after Roux-en-Y gastric bypass surgery.     

磁性水凝胶黏膜下注射辅助离体猪食管内镜黏膜下剥离术的可行性研究

目的 探讨基于磁锚定技术的磁性水凝胶辅助内镜黏膜下剥离术（ESD）的可行性。方法 以新鲜离体猪食管为模型，在黏膜下注射自行配置的海藻酸钠-四氧化三铁微粒溶液和交联剂，使两者发生反应形成磁性水凝胶。在食管外放置锚定磁体后，黏膜下的磁性水凝胶被吸引，连同病变黏膜一起被抬起，可辅助完成ESD。结果 在锚定磁体的磁场力作用下，磁性水凝胶被锚定磁体吸引，可充分显露黏膜剥离面术野并形成足够的组织张力，改善术者操作体验，提高整块黏膜切除率。结论 黏膜下注射磁性水凝胶在食管ESD中具有可行性，后续将进一步优化磁性水凝胶性能并进行验证。该技术有望应用于临床。     

内镜黏膜下剥离术治疗胃窦黏膜脱垂10例临床效果报道

目的探讨内镜黏膜下剥离术(ESD)治疗胃窦黏膜脱垂的疗效及安全性。方法对符合胃镜下所见的典型胃窦黏膜脱垂表现的患者,超声胃镜确认病变在黏膜层,排除肿瘤等疾病。经过质子泵抑制剂(PPI)连续治疗3个月,症状无明显好转,在患者知情同意的前提下行ESD。术后3个月门诊复诊,复查胃镜。结果 10例接受ESD术的胃窦黏膜脱垂患者,术中术后均未见出血、穿孔等并发症,术后3个月随访,患者症状明显改善,内镜下未见胃窦黏膜脱垂。结论 ESD术治疗胃窦黏膜脱垂是有效和安全的。     

Gastric ulcer healing after treatment of endoscopic submucosal dissection in Japanese: comparison of H(2) receptor antagonist and proton pump inhibitor administration

Endoscopic submucosal dissection has made it possible to resect large lesions during a single operation. The present study was undertaken to compare the time taken for recovery from artificial ulcers after endoscopic submucosal dissection between an H(2) Receptor Antagonist treatment group and a Proton Pump Inhibitor treatment group, focusing on analysis of the time course of reduction rate in ulcer area. The powerful acid suppression by Proton Pump Inhibitor may not be needed to treat Japanese post-endoscopic submucosal dissection ulcer which usually develops after early gastric carcinoma in the mucosa of low acid secretory capacity. The study involved 60 patients with 69 artificial ulcers following endoscopic submucosal dissection for the treatment of tumors remaining in the gastric mucosa. Of all lesions, 36 were allocated to the H(2) Receptor Antagonist group and 33 to the Proton Pump Inhibitor group. Patients in both groups underwent endoscopy at 4 and 8 weeks after the start of administration. There were no significant differences between two groups and ulcer healing rates were similar in the two groups. The efficacy of H(2) Receptor Antagonists in curing this type of ulcer can thus be expected to be comparable to that of Proton Pump Inhibitors.     

胃镜精检在首次胃镜提示胃癌前病变中的应用价值*

目的探讨联合应用放大内镜、染色内镜、窄带成像(NBI)及高频超声微探头对首次胃镜提示胃癌前病变的患者进行再次胃镜精检的价值。方法 2014年6月-2015年7月,对该科首次胃镜病理发现胃低级别上皮内瘤变(LGIN)、高级别上皮内瘤变(HGIN)的患者进行电话召回,应用放大内镜、染色内镜和NBI等进行胃镜精检,发现有可疑病灶时进行高频超声微探头检查以判断浸润深度。萎缩性胃炎及肠化但未合并上皮内瘤变的患者未纳入本研究。共65例符合上述标准的患者入选,初次胃镜提示LGIN 56例、HGIN 9例。结果 65例患者最终证实胃癌14例,首诊为LGIN 7例,HGIN 7例。14例胃癌患者中9例于该院治疗[5例行内镜黏膜下剥离术(ESD)、4例手术],其中早期胃癌8例(6例黏膜内癌、2例浸润黏膜下层),1例进展期癌(浸润至浅肌层),另5例均呈早癌内镜表现,但因拒绝于该院治疗,无法确诊分期。结论胃镜检查发现上皮内瘤变时,往往提示存在早期癌变的可能,对该类患者进行有针对性的胃镜精检有助于发现之前遗漏的早癌病灶,避免漏诊。     

Diffuse xanthoma in early esophageal cancer: A case report

BACKGROUNDGastrointestinal xanthomas are asymptomatic and infrequent non-neoplastic lesions that commonly occur in the stomach with Helicobacter pylori-associated gastritis and rarely in the esophagus. To date, there have been no reports of esophageal xanthoma combined with esophageal cancer. Herein, we present the first case in the literature of a diffuse xanthoma complicated with early esophageal cancer. Moreover, this combination makes the endoscopic diagnosis difficult if it is not in mind.CASE SUMMARYA 68-year-old man visited our department with a 2-mo history of epigastric discomfort. He underwent surgery for gastric cancer 6 years ago. Esophagogastroduodenoscopy showed a semi-circumferential irregular yellowish-colored and granular lesion in the esophagus (30-35 cm from the incisors). Using magnifying endoscopy with narrow band imaging, aggregated minute and yellowish-colored spots with tortuous microvessels on the surface were observed, and background coloration was clearly seen in the lesion. As endoscopic biopsy suggested a histologically high-grade dysplasia; the lesion was completely resected en bloc by endoscopic submucosal dissection (ESD). The resected specimen was confirmed to be a squamous cell carcinoma in situ with extensive foamy cells in the superficial mucosal layer. Immunohistochemically, the observed foamy cells were strongly positive for CD68, which is characteristic of xanthoma. The clinical course was favorable, and no recurrence was observed 2 years and 7 mo after ESD.CONCLUSIONDiffuse xanthoma concurrent with early esophageal cancer is extremely rare. The characteristic endoscopic features may assist endoscopists in diagnosing similar lesions.     

Upper endoscopy in international digestive endoscopy network 2012: towards upper end of quality

Upper gastrointestinal (GI) endoscopy is the most basic part of endoscopy field. Although old and basic procedures are still in use, a line of innovative techniques and devices are being introduced to allow much complex and difficult procedures in endoscopy unit. High quality upper endoscopic procedures can replace or obviate surgical treatment. Selected reviews dealing with non-variceal upper GI bleeding, challenging esophageal stenting, endoscopic management of subpeithelial tumor, and endoscopic evaluation for candidate lesions of endoscopic submucosal dissection were selected among the topics from International Digestive Endoscopy Network 2012.     

Synchronized early gastric cancer occurred in a patient with serrated polyposis syndrome: A case report

BACKGROUNDSerrated polyposis syndrome (SPS) is a relatively rare disease that is characterized by multiple serrated lesions/polyps. Very little is known regarding the extracolonic cancers associated with SPS. The genetic basis of the process remains unknown.CASE SUMMARYA 67-year-old male patient initially presented with belching and abdominal distension for a year as well as diarrhea for over 2 mo. The patient underwent colonoscopy and was diagnosed with serrated polyposis syndrome. Half a year later, a gastroscopy was performed during the postoperative re-examination to screen for other lesions of the upper gastrointestinal tract. An elevated lesion was detected in the anterior wall of the gastric antrum. Curative en bloc resection of the lesion was achieved via endoscopic submucosal dissection. The pathological result was high-grade dysplasia with focal intramucosal carcinoma. Exome sequencing was performed for the patient and five gastric cancer-associated variants (methylenetetrahydrofolate reductase, metaxin 1, coiled-coil domain containing 6, glutamate ionotropic receptor delta type subunit 1, and aldehyde dehydrogenase 1) were identified. CONCLUSIONThis paper reports a case that presented with both SPS and early gastric cancer. Genetic mutations that were potentially responsible for this condition were sought by exome sequencing.     

miR-93表达与内镜黏膜下剥离术治疗老年早期胃癌预后的关系及其靶向抑癌基因的生物信息学分析

目的研究miR-93表达与内镜黏膜下剥离术(ESD)治疗老年早期胃癌预后的关系,利用生物信息学分析miR-93的靶向抑癌基因。方法选择2015年1月-2017年12月在该院接受ESD的老年胃癌患者,收集早期胃癌组织并检测miR-93、PTEN和TIMP2的表达量,随访术后复发情况;另取同期经病理证实为正常胃黏膜的组织作为对照,检测miR-93、PTEN和TIMP2的表达量。结果早期胃癌组织中miR-93的表达量高于正常胃黏膜组织,PTEN和TIMP2的表达量低于正常胃黏膜组织(P 0.05),且miR-93的表达量与PTEN和TIMP2的表达量呈负相关,T_2期、低分化和未分化、黏膜下浸润、发生复发的早期胃癌组织中miR-93的表达量高于T_1期、中分化和高分化、黏膜内浸润、未复发的早期胃癌组织,PTEN、TIMP2的表达量明显低于T_1期、中分化和高分化、黏膜内浸润、未复发的早期胃癌组织(P 0.05);黏膜下浸润、miR-93表达增多、PTEN及TIMP2表达减少是早期胃癌患者术后复发的危险因素;miR-93高表达的早期胃癌患者未复发率低于miR-93低表达患者;miR-93预测早期胃癌复发的最佳截点为0.72。结论 miR-93表达是早期胃癌患者ESD后复发的危险因素,对术后复发具有预测价值,靶向抑癌基因PTEN、TIMP2是其可能的生物学作用。     

内镜黏膜下剥离术治疗胃间质瘤的临床效果及术后出血的危险因素分析

目的 探讨内镜黏膜下剥离术(ESD)治疗胃间质瘤的临床疗效及术后出血的危险因素.方法 选取2019年2月-2020年4月该院诊治的135例胃间质瘤作为研究对象,统计手术时间、术后进食时间、住院时间、术后出血、穿孔和感染发生率.根据患者ESD治疗后是否发生出血将患者进一步分为术后出血组(n=12)和术后无出血组(n=12...     

超声内镜在胃黏膜下肿瘤诊断中的局限性*

目的评估超声内镜(EUS)对胃黏膜下肿瘤(SMTs)的诊断价值,并分析胃SMTs的EUS下特点。方法收集2008年9月-2016年12月614例于该院内镜中心经EUS检查后行内镜黏膜下剥离术(ESD)切除治疗的胃SMTs患者资料纳入回顾性研究。病变起源层次以ESD术中诊断为金标准,病变类型以术后病理学及免疫组化结果为金标准,统计EUS诊断的符合率,并分析EUS结果。结果 EUS对病变起源的诊断与ESD术中结果的符合率为91.25%,其中起源于黏膜肌层、黏膜下层和固有肌层的诊断符合率分别为66.67%、80.85%和94.50%;对病变类型的诊断与ESD术后病理结果的符合率为65.99%,其中胃肠间质瘤(GIST)、平滑肌瘤、异位胰腺和脂肪瘤的诊断符合率分别为91.85%、18.56%、79.76%和90.70%。结论 EUS能初步判断胃SMTs的起源层次与病变类型,可为内镜下治疗提供较为准确的依据,但对诊断平滑肌瘤、错构瘤、炎性纤维性息肉、类癌和纤维瘤等少见病变存在一定的局限性。因此,必要时应积极地切除病变,以明确诊断,防止恶变。