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。     

内镜窄带成像技术在诊断Barrett食管中的作用研究

目的早期发现和诊断Barrett食管（BE）中的特殊肠上皮化生（肠化）细胞等癌前病变。方法选择2006年4月至11月问29例经胃镜检查确诊为内镜BE的患者，按普通内镜、内镜窄带成像技术（NBI）、内镜靛胭脂染色加放大技术的顺序进行观察，评价各检查方法图像的清晰度；操作医生对NBI下观察到的BE黏膜腺管开口形态进行Endo分型，于改变最显著部位取活检进行病理检查，以明确特殊肠化的检出率。结果在观察鳞一柱状上皮交界的病变轮廓清晰度方面，普通内镜、染色和NBI内镜之间均有统计学差异，其中NBI最清晰，染色次之；在对BE黏膜的腺管开口形态观察中，NBI及内镜染色显著优于普通内镜；在对浅表毛细血管的观察中，NBI具有绝对优势。NBI下根据Endo分型，其Ⅳ型及V型腺管开口形态检出特殊肠化生的准确性达93％，敏感性及特异性分别达89％及95％。结论NBI作为一种新型的内镜检查系统，不仅操作简单，对病变轮廓显示清晰，更可清晰观察到BE黏膜腺管开口及浅表毛细血管结构形态，对BE食管进行靶向病理活检具有良好指导意义和临床实用价值。     

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...     

内镜窄带成像技术在早期食管癌及癌前病变诊断中的应用

目的 探讨内镜窄带成像技术(NBI)在食管癌及癌前病变诊断中的价值.方法 对205例患者采用普通胃镜及胃镜NBI检查食管,病灶取病理活检,食管癌及中重度异型增生者进入本研究,比较普通胃镜及胃镜NBI对食管癌及中重度异型增生的诊断价值,分析食管癌及癌前病变的NBI表现.结果 普通放大胃镜不易观察到食管上皮内血管,NBI观察食管黏膜呈淡青色,放大观察可清楚地观察到茶色的食管上皮内血管及青色的深层血管.NBI观察早期食管癌及异型增生病灶呈茶色,病灶处深层血管不能显示.5例中重度异型增生及2例m1癌病灶的上皮乳头内血管环(IPCL)均表现为IPCL-Type Ⅳ-1型改变,2例m2癌为IPCL-Type Ⅳ-2型改变;3例m3及1例sm1癌为IPCL-Type Ⅳ-3型改变;3例sm2及8例进展期癌为IPCL-Type Ⅳ-4型改变.结论 NBI可观察食管黏膜及黏膜下的血管改变,较普通胃镜更易发现早期食管癌及癌前病变病灶.     

内镜窄带成像技术在结肠肿瘤诊断中的价值

目的 将内镜窄带成像技术（NBI）、色素内镜检查结果与病理学检查结果进行对比,探讨NBI在结肠肿瘤诊断中的价值。方法78例患者96个结肠病变进行NBI放大观察并与染色放大内镜观察和最终病理结果进行比较。结果普通肠镜发现息肉的敏感性为78．7％,切换NBI后,能清楚显示息肉性病变的形态和边界,发现息肉的敏感性99％。放大NBI肠镜对于Ⅱ型,Ⅲ1型,Ⅳ型,ⅤN型息肉腺管开口的图像与色素内镜图像有较好的相似性,NBI对于腺管开口的识别能力明显优于普通结肠镜,但是次于色素内镜。NBI对息肉表面血管形态进行分类对判断结肠是否有肿瘤的能力,其敏感性为100％,特异性为87．8％,同样明显优于普通结肠镜,而次于色素内镜。结论NBI肠镜及色素内镜均能提高发现结肠息肉的特异性、敏感性。色素内镜能清晰显示病变表面结构和腺管开口,使内镜下对于肿瘤与非肿瘤的鉴别诊断接近病理诊断。NBI放大肠镜能清晰显示息肉表面的毛细血管形态,较好地区分肿瘤与非肿瘤。NBI内镜切换简单快捷,便于全结肠观察,利于发现早期结肠肿瘤。     

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。     

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。     

Diagnosis of early gastric cancer using narrow band imaging and acetic acid

AIM: To determine whether the endoscopic findings of depressed-type early gastric cancers(EGCs) could precisely predict the histological type.METHODS: Ninety depressed-type EGCs in 72 patients were macroscopically and histologically identified. We evaluated the microvascular(MV) and mucosal surface(MS) patterns of depressed-type EGCs using magnifying endoscopy(ME) with narrow-band imaging(NBI)(NBI-ME) and ME enhanced by 1.5% acetic acid, respectively. First, depressed-type EGCs were classified according to MV pattern by NBI-ME. Subsequently, EGCs unclassified by MV pattern were classified according to MS pattern by enhanced ME(EME) images obtained from the same angle.RESULTS: We classified the depressed-type EGCs into the following 2 MV patterns using NBI-ME: a fine-network pattern that indicated differentiated adenocarcinoma(25/25, 100%) and a corkscrew pattern that likely indicated undifferentiated adenocarcinoma(18/23, 78.3%). However, 42 of the 90(46.7%) lesions could not be classified into MV patterns by NBI-ME. These unclassified lesions were then evaluated for MS patterns using EME, which classified 33(81.0%) lesions as MS patterns, diagnosed as differentiated adenocarcinoma. As a result, 76 of the 90(84.4%) lesions were matched with histological diagnoses using a combination of NBI-ME and EME.CONCLUSION: A combination of NBI-ME and EME was useful in predicting the histological type of depressedtype EGC.     

早期胃癌的内镜识别与诊断

不同类型的胃癌,其形态表现各不相同。尤其是早期胃癌病灶黏膜的形态改变可自细微异常至显著病变,即使是有经验的专业人员也常常误判。浅表隆起较小的0-Ⅱa病灶通常局限于黏膜内。图1A示胃窦大弯匍匐状微隆病灶,表面均匀发红,手术病理证实为高分化腺癌,浸润黏膜肌。0-Ⅱa+Ⅱc型是较多见的一种早期胃癌形态,周     

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.     

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.     

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.     

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.     

窄带成像放大内镜下胃小凹形态观察的临床价值

目的探讨窄带成像放大内镜(NBI)技术下胃小凹的形态分型及其临床价值。方法应用窄带成像放大内镜技术对113例患者进行检查,观察胃小凹形态,并于各不同形态处行活组织检查。结果 A、B型胃小凹主要见于慢性浅表性胃炎,C、D、E型胃小凹主要见于慢性萎缩性胃炎,D、E型胃小凹与肠上皮化生及异型增生密切相关。结论通过窄带成像放大内镜对5种胃小凹的形态观察可以推测病理组织学诊断,使镜下准确诊断胃黏膜萎缩、肠上皮化生及异型增生成为可能,以指导正确的治疗方法及内镜下随诊。     

窄带成像辅助氩等离子凝固术治疗Barrett食管的临床应用

目的 探讨内镜窄带成像技术（NBI）辅助氩等离子凝固术（APC）治疗Barrett食管的价值.方法 86例经内镜检查及病理诊断的Barrett食管,分别在普通模式及NBI模式下观察食管黏膜,以NBI放大观察病变的腺管开口形态及毛细血管结构形态.对所有NBI阳性部位均取活检,并以病理结果为标准,随机分为两组.Barrett食管的诊断时都用NBI内镜,治疗组42例,在NBI内镜辅助下进行APC治疗,内镜进入食管后,把APC探针经活检钳孔道伸出镜外1 cm,定位于需治疗黏膜1～2 cm处,以保证APC安全使用;对照组44例,在普通内镜下行APC治疗.于第3、6个月对两组进行内镜及病理随访.结果 两组治疗后第3、6个月从内镜、病理随访的有效率来看,治疗组与对照组的差异无统计学意义（P〉0.05）.结论 NBI辅助APC治疗Barrett食管能有效逆转Barrett上皮,并提高高级别上皮瘤样变的检出率,减少Barrett上皮逆转的治疗次数,且能部分缓解功能性胃肠病的症状,治疗安全.