窄带成像技术结合放大内镜在早期胃癌诊断中的价值研究

目的评价窄带成像技术（NBI）结合放大内镜在早期胃癌诊断中的应用价值。方法2008年3月至2008年12月经普通内镜发现存在胃黏膜可疑病灶且符合研究要求的患者共56例,行NBI结合放大内镜及靛胭脂染色检查,对NBI、靛胭脂染色诊断的胃黏膜腺管及微血管形态的清晰程度评分进行比较。内镜检查之后对所检查部位进行靶向活检,将NBI结合放大内镜及靛胭脂染色检查结果及病理检查结果进行比较。结果56例中有16例经病理诊断为早期胃癌。将NBI结合放大内镜及靛胭脂染色检查结果及病理检查结果进行统计得出：NBI结合放大内镜诊断早期胃癌的诊断符合率、敏感性、特异性、假阳性率、假阴性率分别为94．6％（53／56）、93．8％（15／16）、95．0％（38／40）、5．0％（2／40）、6．3％（1／16）;靛胭脂染色诊断早期胃癌的诊断符合率、敏感性、特异性分别为91．1％（51／56）、87．5％（14／16）、92．5％（37／40）,假阳性率、假阴性率分别为7．5％（3／40）、12．5％（2／16）;二者比较差异均无统计学意义（P均〉0．05）。NBI、靛胭脂染色诊断的胃黏膜腺管及微血管形态的清晰程度评分结果对比显示：NBI与靛胭脂染色在腺管结构显示方面无明显差别,但NBI显示微血管形态明显优于靛胭脂染色。结论NBI结合放大内镜可以提供清晰的胃黏膜血管图像,有助于早期胃癌的诊断,可提高活检检查的准确性,与靛胭脂染色联用可提高早期胃癌的诊断率。     

窄带成像结合放大内镜在早期胃癌诊断中的应用

随着消化内镜新技术的不断发展,提高了对胃黏膜微结构观察能力。胃黏膜病变时其表面形态会发生变化,根据其变化的特点,主要包含表面微结构和微血管结构的改变,可早期发现黏膜病变,并大致预测病理组织学类型。这对于胃癌前病变、早期胃癌的诊断和治疗具有重要的临床价值。本文就胃黏膜微结构与胃黏膜病变的关系,尤其与早期胃癌的关系,进行综述。     

白光内镜、放大内镜及放大内镜联合窄带成像技术对早期胃癌的诊疗价值

背景 胃癌是我国常见的消化道恶性肿瘤之一,进展期胃癌患者5年生存率不到20％,而早期胃癌(EGC)患者5年生存率高于90％.放大内镜(ME)联合窄带成像技术(NBI)有助于EGC的诊断,也有利于指导进一步治疗.目的 比较白光内镜、ME及ME联合NBI对EGC的诊疗价值.方法 选取2017年6月—2019年5月邢台市人民...     

窄带成像联合放大内镜在早期胃癌诊断中的价值

目的 分析放大胃镜+窄带成像(ME-NBI)鉴别早期胃癌的临床价值。方法 选取2016年12月至2022月6月在我院检查60例可疑胃早癌患者为研究对象,所有患者均进行腹部增强CT检查、普通白光内镜(WLE)检查和ME-NBI检查,并以病理活检为金标准,分析三种检查手段对早期胃癌的诊断价值。结果 60例可疑胃早癌患者中病理检出胃癌患者23例(38.33%),萎缩性胃炎并肠化患者34例(56.67%),慢性胃炎患者3例(5%)。ME-NBI对萎缩性胃炎并肠化患者的检出率高于腹部增强CT和WLE(腹部增强CT0例,WLE检查24例,ME-NBI检查31例,P<0.05)。腹部增强CT检查早期胃癌阳性患者17例,阴性患者43例;WLE检查早期胃癌阳性患者20例,阴性患者40例;ME-NBI检查早期胃癌阳性患者21例,阴性患者39例。腹部增强CT特异度、灵敏度、阳性预测值、阴性预测值以及准确度均低于WLE和ME-NBI,P<0.05。WLE和ME-NBI检查早期胃癌的阴性预测值相比差异无统计学意义(P>0.05);ME-NBI检查早期胃癌的灵敏度、特异度、阳性预测值、准确度均高...     

普通白光联合窄带光成像放大内镜检查诊断早期胃癌浸润深度的模型研究

目的分析早期胃癌(EGC)黏膜下浸润的特征表现,通过联合白光内镜及窄带光成像结合放大内镜(ME-NBI)检查提高EGC浸润深度诊断的准确性。方法回顾性分析2015年1月至2017年12月期间因术前怀疑EGC于北京友谊医院行内镜黏膜下剥离术或外科手术治疗的患者资料。收集患者基本信息、病灶特征及术后病理等信息,分析EGC黏膜下浸润的特征、黏膜下浸润的独立危险因素,构建预测EGC浸润深度的模型。结果195例患者(207处病灶)纳入研究。207例病灶以2:1比例随机分为建模组(138处)及测试组(69处)。在建模组,病灶位于胃上1/3(0K=12.949,95%CZ:2.148~7&070,P=0.005),胃中1/3(OR=7.534,95%C/:1.044~54.360,P=0.045),病灶长径>2 cm(OR=6.828,95%C/:1.657~28.136,P=0.008)及存在扩张血管(OR=6.856,95%C/:1.577~29.805,P=0.010)是病灶黏膜下浸润的独立危险因素。根据上述独立危险因素构建浸润深度预测评分系统(DPSS)(病灶位于胃上1/3、病灶位于胃中1/3、病灶长径>2 cm、存在扩张血管各为5分、4分、4分、4分)。在建模组及测试组,DPSS预测病灶黏膜下浸润的受试者工作特征曲线下面积分别为0.884(95%C/:0.809-0.960)及0.799(95%C/:0.684~0.914)0界值为8分时,建模组及测试组诊断敏感度分别为83.3%、71.4%,特异度分别为76.2%,74.5%o结论联合普通白光内镜及ME-NBI建立的DPSS可以较好地预测EGC浸润深度。     

窄带成像技术在早期胃癌内镜诊断中的应用

目的探讨窄带成像（NBI）技术对早期胃癌的诊断价值。方法46例常规内镜发现病灶者,分别于放大内镜下行NBI及靛胭脂染色,观察黏膜腺管形态及微血管结构变化,计算清晰度评分;评价病变性质并与术后病理检查结果进行比较。结果NBI与靛胭脂染色腺管结构清晰度评分无显著差异,但微血管结构评分前者明显高于后者,P〈0．05。二者诊断早期胃癌的敏感性、特异性及与病理诊断的符合率无明显差异。结论NBI诊断早期胃癌效果确切,其优点为能清晰显示病灶微血管结构变化,从而提高诊断的精确性。     

窄带成像技术结合放大内镜在Barrett管诊断中的价值

正常的食管黏膜应为鳞状上皮,长期的胃食管反流会使食管下段的鳞状上皮被柱状上皮替代,形成Barrett食管(BE).窄带成像技术(NBI)是近年来应用在内镜检查中的一项新技术,通过不同波长的窄带光波增加了黏膜上皮和黏膜下血管模式的对比度和清晰度,与放大内镜结合可以清楚地显示黏膜微血管和腺管结构形态,有利于判断病变性质[1,2].本研究采用NBI结合放大内镜与普通胃镜对发现的BE病灶进行观察和诊断,并与病理检查结果进行比较,探讨其在发现和诊断Barrett食管的应用价值.     

放大内镜窄带成像联合活检在早期胃癌诊断中的价值

目的 分析放大内镜窄带成像(ME-NBI)联合活检在早期胃癌(EGC)诊断中的价值。方法 回顾性分析2019年1月至2021年12月在蚌埠市第三人民医院经普通白光胃镜检查发现胃黏膜可疑EGC的患者,并行内镜下切除(ER)包括内镜下黏膜剥离术(ESD)或内镜下黏膜切除术(EMR)的病例,依据术前最后一次内镜检查方法不同进行分组,分为普通白光胃镜(WLE)活检组、ME-NBI组和ME-NBI联合活检组,比较三组对病灶的术前诊断结果与术后病理诊断结果的一致性。结果WLE活检组、ME-NBI及ME-NBI联合活检对病灶的术前诊断与术后病理诊断一致率分别为77.8%、80.6%、97.2%,ME-NBI活检组在诊断癌性病变的正确率97.2%、灵敏度92.9%、特异度100%、阳性预测值100%、阴性预测值95.7%。结论 ME-NBI联合活检对EGC的诊断具有较高的准确率,优于WLE活检及单纯ME-NBI检查,值得在EGC诊断中推广应用。     

放大内镜及窄带成像技术在慢性胃炎诊断中的应用

长期以来,人们始终在探索能否在内镜直视下正确地诊断慢性胃炎,尤其是能否直接发现幽门螺杆菌(H.pylori)感染、肠上皮化生、腺体萎缩等的存     

Magnifying narrow-band imaging endoscopy is superior in diagnosis of early gastric cancer

AIM: To evaluate the diagnostic effectiveness of white light endoscopy, magnifying endoscopy (ME), and magnifying narrow-band imaging endoscopy (ME-NBI) in detecting early gastric cancer (EGC).METHODS: From March 2010 to June 2012, a total of 3616 patients received screening for gastric cancer by magnifying endoscopy. There were 3675 focal gastric lesions detected using conventional high definition white light endoscopy (HD-WLE) in four different referential hospitals that were recruited for further investigation using ME and ME-NBI. The images obtained from HD-WLE, ME, and ME-NBI were reviewed by four experienced endoscopists to evaluate their diagnostic effectiveness for EGC. The diagnosis of cancerous and non-cancerous lesions was conducted by evaluating the microvascular and microsurface patterns using the VS classification system. The final endoscopic diagnosis of each lesion was determined by consultation when a disagreement occurred. We used histopathological results as the gold standard for the diagnosis of EGC.RESULTS: Among the 3675 lesions found, 1508 were validated by pathological findings as chronic gastritis, 1279 as chronic gastritis with intestinal metaplasia, 631 as low-grade neoplasia, and 257 as EGC. The sensitivity, specificity, positive predictive value, negative predictive value, and accuracy of HD-WLE for the diagnosis of EGC were 71.2%, 99.1%, 85.5%, 97.9% and 97.1%, respectively. The results of ME for diagnosing EGC were 81.3%, 98.8%, 83.3%, 98.6% and 97.6%, respectively. The results of ME-NBI for the diagnosis of EGC were 87.2%, 98.6%, 82.1%, 99.0% and 97.8%, respectively. The diagnostic sensitivity and accuracy of paired ME and ME-NBI were significantly better than those of HD-WLE (P < 0.05).CONCLUSION: HD-WLE has a relatively high accuracy for diagnosing EGC and is an effective screening tool. Further investigations of ME and ME-NBI are required to achieve superior accuracy.     

Novel narrow-band imaging magnifying endoscopic classification for early gastric cancer

Background

Narrow-band imaging magnifying endoscopy is widely used in Japan, but still there is no set of consistent guidelines for gastric lesions.

Aims

To introduce a new narrow-band imaging magnifying endoscopic classification and report the accuracy of diagnosis in comparison to underlying histopathology of gastric lesions.

Methods

Two hundred and fifty-seven consecutive patients with early gastric cancer lesions were enrolled into this study. Narrow-band imaging magnifying images were classified into four categories based on abnormal microvascular patterns and irregularities in the superficial glandular structure: fine-network pattern, corkscrew pattern, intra-lobular loop pattern-1 and intra-lobular loop pattern-2. The narrow-band imaging magnifying endoscopic classification was compared with the histopathological findings.

Results

Amongst the differentiated-type adenocarcinoma lesions, fine-network pattern, intra-lobular loop pattern-1, intra-lobular loop pattern-2 and corkscrew pattern were observed in 15.7%, 59.6%, 24.2% and 0.5%, respectively. Differentiated-type adenocarcinomas mainly exhibited fine-network pattern or intra-lobular loop pattern. In undifferentiated-type adenocarcinoma lesions, intra-lobular loop pattern-2 and corkscrew pattern were observed in 41.2% and 58.8%, respectively. Therefore, undifferentiated-type adenocarcinomas were all classified as intra-lobular loop pattern-2 and corkscrew pattern. The histopathological types were not equivalent with the narrow-band imaging magnifying classification categories (P < 0.001).

Conclusions

The new narrow-band imaging magnifying classification that incorporates the intra-lobular loop pattern may be able to predict the histological subtype of most gastric carcinomas.     

Diagnostic performance of magnifying narrow-band imaging for early gastric cancer: A meta-analysis

AIM: To investigate the performance of magnifying endoscopy with narrow-band imaging (ME-NBI) in the diagnosis of early gastric cancer (EGC).METHODS: Systematic literature searches were conducted until February 2014 in PubMed, EMBASE, Web of Science, Ovid, Scopus and the Cochrane Library databases by two independent reviewers. Meta-analysis was performed to calculate the pooled sensitivity, specificity and diagnostic odds ratio and to construct a summary receiver operating characteristic (ROC) curve. Subgroup analyses were performed based on the morphology type of lesions, diagnostic standard, the size of lesions, type of assessment, country and sample size to explore possible sources of heterogeneity. A Deeks’ asymmetry test was used to evaluate the publication bias.RESULTS: Fourteen studies enrolling 2171 patients were included. The pooled sensitivity, specificity and diagnostic odds ratio for ME-NBI diagnosis of EGC were 0.86 (95%CI: 0.83-0.89), 0.96 (95%CI: 0.95-0.97) and 102.75 (95%CI: 48.14-219.32), respectively, with the area under ROC curve being 0.9623. Among the 14 studies, six also evaluated the diagnostic value of conventional white-light imaging, with a sensitivity of 0.57 (95%CI: 0.50-0.64) and a specificity of 0.79 (95%CI: 0.76-0.81). When using “VS” (vessel plus surface) ME-NBI diagnostic systems in gastric lesions of depressed macroscopic type, the pooled sensitivity and specificity were 0.64 (95%CI: 0.52-0.75) and 0.96 (95%CI: 0.95-0.98). For the lesions with a diameter less than 10 mm, the sensitivity and specificity were 0.74 (95%CI: 0.65-0.82) and 0.98 (95%CI: 0.97-0.98).CONCLUSION: ME-NBI is a promising endoscopic tool in the diagnosis of early gastric cancer and might be helpful in further target biopsy.     

Diagnostic ability of blue laser imaging combined with magnifying endoscopy for early esophageal cancer

BackgroundBlue laser imaging (BLI) is a new image-enhanced endoscopy technique that utilizes a laser light source developed for narrow-band light observation.AimsTo evaluate the value of BLI combined with magnifying endoscopy (M-BLI) for the diagnosis of early esophageal cancers (EECs).MethodsThis single-center prospective study analyzed 149 patients with focal esophageal lesions detected with white light endoscopy (WLE) at Renmin Hospital of Wuhan University between April 2015 and June 2017. In this study, patients were examined sequentially with narrow-band imaging combined with magnifying endoscopy (M-NBI), M-BLI and 1.25% Lugol’s iodine chromoendoscopy. The concordance between endoscopic diagnosis and pathological diagnosis was evaluated using the agreement (kappa) test. The paired chi-square test was used to compare the concordance of M-NBI, M-BLI and Lugol’s iodine chromoendoscopy.ResultsThis study analyzed 153 lesions (four patients had two lesions each). The sensitivity, specificity, accuracy, concordance rates and kappa value of M-BLI were 95.2%, 91.9%, 85.7%, 92.8% and 0.891, respectively; those of M-NBI were 95.2%, 92.8%, 87.5%, 93.5% and 0.906; and those of Lugol’s iodine chromoendoscopy were 95.2%, 94.6%, 91.3%, 94.8% and 0.936.ConclusionM-BLI has a diagnostic profile similar to that of M-NBI and could improve the accuracy of EEC diagnosis.     

Prediction of submucosal gastric cancer by narrow-band imaging magnifying endoscopy

BackgroundThe features of gastric submucosal cancer revealed by magnifying endoscopy have not been reported. Aim of our study was to investigate whether magnifying endoscopy could contribute to the diagnosis of submucosal invasion.Patients and methodsIn this prospective, cross-sectional study, 197 lesions of gastric differentiated adenocarcinoma, diagnosed as mucosal cancer by conventional endoscopy, were observed by magnifying endoscopy with narrow-band imaging, paying attention to the presence of a blurry mucosal pattern and an irregular mesh pattern. After endoscopic submucosal dissection, all lesions were examined histologically and the areas of two features were estimated.ResultsAmong the lesions examined, 177 were diagnosed histologically as mucosal cancer and 20 as submucosal cancer. Multivariate logistic regression analysis confirmed that a blurry mucosal pattern (odds ratio 12.15, 95% confidence interval 3.45–42.76, p = 0.000) and an irregular mesh pattern (22.55, 4.22–120.45, p = 0.000) were independent predictors of submucosal invasion.ConclusionsNarrow band imaging magnifying endoscopic features are useful for predicting submucosal invasion in gastric cancer.     

醋酸联合窄带成像放大内镜在结直肠小息肉诊断中的价值

目的 探讨醋酸联合窄带成像放大内镜（NBI-ME）在结直肠小息肉诊断中的价值。 方法 对行内镜治疗的122例261个肠息肉依次采用放大内镜（ME）、NBI-ME和醋酸联合NBI-ME模式观察病灶,保留图像。分别由3位有放大内镜诊断经验的内镜医师（专家）及3位无放大内镜诊断经验的内镜医师（非专家）独立观察图像,图像评估依据工藤腺管开口形态分型诊断标准。以组织病理诊断为金标准,评价不同放大内镜模式对结直肠小息肉诊断的准确性,并对各种放大模式下图像的清晰度及观察者间的一致性进行对比分析。 结果 专家组ME、NBI-ME、醋酸联合NBI-ME模式诊断结直肠肿瘤性小息肉的准确率分别为65.5％（171／261）、90.0％（235／261）、94.6％（247／261）,非专家组分别为57.1％（149／261）、83.1％（217／261）、89.3％（233／261）。专家组、非专家组醋酸联合NBI-ME模式诊断结直肠肿瘤性小息肉的准确率明显高于NBI-ME（P均＜0.05）和ME模式（P均＜0.001）。专家组、非专家组醋酸联合NBI-ME模式清晰度评分均明显大于NBI-ME、ME模式（P均＜0.001）。观察者间一致性评价显示,专家组ME、NBI-ME及醋酸联合NBI-ME模式诊断结直肠肿瘤性小息肉的Kappa值（95％CI）分别为0.578 （0.508～0.648）、0.669 （0.599～0.739）、0.940 （0.870～1.010）,非专家组分别为0.476 （0.406～0.546）、 0.534 （0.464～0.604）、 0.830 （0.760～0.900）;醋酸联合NBI-ME模式一致性好。 结论 醋酸联合NBI-ME对结直肠小息肉性质的诊断准确性和可重复性较高。     

放大内镜联合智能电子分光技术诊断早期胃癌的临床研究

目的 通过分析放大胃镜联合富士能智能电子分光技术( FICE)诊断早期胃癌的准确度,评价其临床应用价值.方法 2009年4月至2011年3月在常规内镜检查时发现可疑的微小凹陷病变(SDL),则分别用放大胃镜和放大胃镜联合FICE进行观察,参照国外文献,根据病变处腺管开口形态、微血管形态及病变处与周围黏膜的界限三方面指标,初步制定早期胃癌内镜诊断标准,并根据此标准对病变做出内镜诊断.结果 74处可疑SDL中,病理组织学证实癌性病变17例,非癌性病变56例.放大胃镜的敏感度、特异度、准确度分别为41.18％、94.74％和82.43％.放大胃镜联合FICE的敏感度、特异度、准确度分别为86.67％、96.49％和91.89％.放大胃镜联合FICE诊断的敏感度明显高于放大胃镜(P＜0.05).结论 放大胃镜联合FICE可以更清晰的观察病变的腺管开口、微血管及病变与周围组织的界线等微细结构.我们制定的内镜诊断标准,可以更全面的概括了早期胃癌的黏膜微细形态特征,提高内镜诊断的准确度.     

Magnifying endoscopy of gastric epithelial dysplasia based on the morphologic characteristics

AIM: To investigate the difference in magnifying endoscopic findings of gastric epithelial dysplasias (GEDs) according to the morphologic characteristics.METHODS: This study included 46 GED lesions in 45 patients who underwent magnifying endoscopy using narrow band imaging (ME-NBI) before endoscopic resection. During ME-NBI, the microvascular and microsurface (MS) patterns and the presence of light blue crest (LBC) and white opaque substance were investigated. GEDs were categorized as adenomatous, foveolar, and hybrid types, and their mucin phenotype was evaluated.RESULTS: Of the 46 lesions, 27 (59%) were categorized as adenomatous, 15 (32%) as hybrid, and the remaining 4 (9%) as foveolar. All adenomatous GEDs showed the round pit and/or tubular MS patterns, all foveolar GEDs showed the papillary pattern, and hybrid GEDs showed mixed patterns (P < 0.001). LBC was more frequently observed in adenomatous GEDs than in hybrid or foveolar GEDs (52%, 33%, 0%, respectively), although this difference was not significant (P = 0.127). The papillary MS pattern was associated with MUC5AC and MUC6 expression, and the round pit and/or tubular MS patterns were associated with CD10 expression.CONCLUSION: The MS pattern in ME-NBI findings is useful for predicting the morphologic category and mucin phenotype of GEDs, and ME-NBI findings may guide decisions regarding GED treatment.