放大结肠镜对大肠息肉的诊断价值

目的探讨大肠息肉黏膜腺管开口形态分型与病理组织学的相关性，提高大肠早期癌的检出率。方法放大结肠镜检查结合0．2％亚甲蓝染色观察151颗大肠息肉黏膜腺管开口形态，采用日本学者Kudo分型，将其分型与病理学相比较。结果151颗大肠息肉中癌变5颗，放大内镜下1颗表现为Ⅳ型，4颗为V型。放大结肠镜对大肠息肉是否瘤性的镜下诊断的灵敏度为94．8％，特异度为89．2％，阳性预测值为96．5％，阴性预测值为84．6％，Kappa值为0．822，具有极好的一致性。结论放大结肠镜有利于鉴别瘤性和非瘤性息肉，镜下判断大肠息肉性质准确率高。     

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。     

高清不放大窄带成像内镜对大肠隆起性病变的鉴别诊断作用

目的评价窄带成像技术(NBI)普通内镜在大肠隆起样病变诊断中价值。方法应用NBI普通内镜观察了80例患者共103个大肠隆起样病变的表面腺管开口形态。根据工藤进英腺管开口形态分型法,将NBI内镜诊断结果与病理检查结果进行比较。结果普通肠镜发现隆起样病变的敏感性为80.0%(80/103),切换NBI后,能清楚显示隆起样病变的形态和边界,发现隆起样病变的敏感性为100%(103/103);NBI普通内镜观察隆起样病变腺管开口,根据工藤进英腺管开口形态分型法进行诊断,其中腺管开口呈Ⅱ型18例,Ⅲ(L)型54例,Ⅳ型15例,Ⅴ型16例。NBI普通内镜对于大肠隆起性病变肿瘤及非肿瘤性的鉴别诊断的敏感性、特异性分别为95.3%(81/85)、83.3%(15/18)、NBI普通内镜对于大肠隆起性病变肿瘤及非肿瘤性的鉴别诊断的符合率为93.2%(96/103),与文献报道的NBI放大内镜的94.1%无统计学差异(P0.05)。结论应用NBI普通内镜,也可以通过观察腺管开口形态,比较准确地鉴别诊断大肠肿瘤与非肿瘤病变。     

窄带成像结肠镜对结肠息肉样病变的诊断价值

探讨窄带成像（NBI）结肠镜对结肠息肉样病变的病理组织类型的预测能力.方法 125例患者接受结肠镜检查诊断结肠息肉样病变173个,根据腺管开口形态及NBI下血管分型判定该病变为肿瘤性病变（结肠腺瘤、结肠癌）或非肿瘤性病变,并与病理结果对照,判定各种方法的敏感性、特异性及准确率.结果 NBI下血管形态鉴别肿瘤性或非肿瘤性病变的敏感性、特异性及准确率（94.83%、91.23%、93.64%）以及隐窝形态结合血管形态鉴别肿瘤性或非肿瘤性病变的敏感性、特异性及准确率（95.69%、96.49%、95.59%）显著高于常规内镜（80.17%、84.21%、81.50%）（P〈0.05）.血管形态鉴别腺瘤与结肠癌的敏感性、特异性、准确率为86.90%、100.00%、87.93%.结论 NBI模式下结肠镜检查对息肉样病变的肿瘤性、非肿瘤性,结肠腺瘤、结肠癌的鉴别优于常规内镜检查,接近病理学检查.     

利用窄带成像技术观察毛细血管形态在结直肠息肉样病变鉴别诊断中的价值

目的:探讨利用窄带成像技术(narrow bandimaging,NBI)观察毛细血管形态(capillarypatterns,CP)对结直肠息肉样病变鉴别诊断的价值.方法:75例患者接受NBI结肠镜检查共发现病变部位116处.根据Yoshiki的分型方法,将结直肠病变的CP分为6种:蜂窝状结构型、模糊结构型、网状结构型、密度增高型、不规则结构型、稀疏结构型.利用NBI下观察到的CP进行鉴别诊断,并与病理结果对照判定其敏感性、特异性及准确率.结果:在116例结直肠病变中增生性息肉毛细血管形态多表现为模糊结构型,而腺瘤性息肉的毛细血管形态表现为网状结构型和密度增高型,癌症的毛细血管形态多表现为不规则型和稀疏结构型.利用此分型方法鉴别肿瘤性病变和非肿瘤性病变的敏感性和特异性分别是94.6%和78.6%,准确性88.8%,阳性预测值(positive predictive value,PPV)88.6%,阴性预测值(negative predictivevalue,NPV)89.2%(P<0.01).同样,对于腺瘤性息肉和癌症的鉴别诊断的敏感性和特异性分别是100.0%和87.5%,准确性91.4%(P<0.01).将直径<10 mm的小息肉按毛细血管的有无进行鉴别诊断的敏感性和特异性分别是89.7%和80.5%,PPV81.4%,NPV89.2%,准确性85.0%(P<0.01).结论:NBI结肠镜观察结直肠病变CP对于鉴别肿瘤性病变与非肿瘤性病变,以及腺瘤性息肉与癌症具有可靠的诊断价值.对于直径<10 m m小息肉的肿瘤性及非肿瘤性的鉴别诊断方面NBI结肠镜也具有很好作用.     

窄带成像放大内镜鉴别大肠肿瘤性与非肿瘤性病变的价值

目的 探讨窄带成像放大内镜（NBI—ME）鉴别大肠肿瘤性与非肿瘤性病变表面网状微血管结构改变的临床价值。方法选择常规内镜检出大肠肿瘤性、非肿瘤性病变144处（102例）,记录NBI—ME观察病变表面微血管结构（CP）形态和染色放大内镜观察病变黏膜表面腺管开口（pit）形态。分析pit周围CP形态变化,比较两者形态间的关系。所有病变经内镜或手术治疗后行组织病理学检查。结果常规内镜鉴别病变是否为肿瘤性的准确率75．7％、敏感性85．1％、特异性40．0％,明显低于NBI—ME和染色放大内镜（P〈0．005）,NBI—ME和染色放大内镜间则未见差异。CP分型与pit分型对照,CP—Ⅰ型、Ⅱ型、Ⅳ型、Ⅵa型分别与pitⅠ型、Ⅱ型、Ⅳ型、Ⅴ1型间一致性达100％。144处病变中,内镜治疗129处,手术治疗15处。组织病理学检查：非肿瘤性30处（增生性息肉17处、炎症性息肉13处）;肿瘤性114处（腺瘤95处、腺癌19处）。结论初步显示NBI—ME和染色放大内镜之间具有正相关性,两种检查方法互补可作为当前鉴别大肠病变是否为肿瘤性的重要手段。     

窄带成像技术普通内镜与放大内镜对大肠肿瘤诊断价值的对比研究

目的 探讨窄带成像技术（NBI）模式下普通内镜和放大内镜对大肠肿瘤性与非肿瘤性病变的鉴别诊断价值.方法 选择2008年9月至2010年2月间内镜中心行NBI内镜检查发现的大肠新生性病变的患者,对发现的大肠新生性病变进行黏膜表面细微腺管开口形态分型及微血管形态分型,综合工藤进英腺管开口形态分型法与佐野宁微血管形态分型法进行诊断,将NBI内镜诊断结果与病理诊断结果进行对比分析.100例患者符合条件纳入研究,其中行NBI普通内镜64例,行NBI放大内镜36例.结果 排除不符合诊断标准的7例病例（NBI普通内镜5例,NBI放大内镜2例）,NBI内镜对大肠肿瘤性与非肿瘤性病变诊断的总符合率为91.4%（85/93）,其中NBI普通内镜为89.8%（53/59）,NBI放大内镜为94.1%（32/34）,均明显高于文献报道传统内镜的79.1%（P均＜0.05）,但NBI普通内镜与NBI放大内镜间比较差异无统计学意义（P＞0.05）.结论 与NBI放大内镜相似,NBI普通内镜也可比较准确地鉴别大肠肿瘤性与非肿瘤性病变.     

窄带成像技术普通内镜诊断大肠肿瘤的价值

目的探讨窄带成像技术普通内镜（NBI）诊断大肠肿瘤的临床价值。方法 2012年6月至2012年8月行常规内镜和NBI普通内镜检查的患者225例,对发现的大肠新生性病变记录腺管开口形态,将NBI内镜诊断和病理组织学诊断结果进行对比分析,并比较NBI内镜与常规内镜在鉴别肿瘤性和非肿瘤性病变的敏感性、特异性和准确性。结果 NBI普通内镜对腺管开口类型的判断接近病理水平,鉴别病变是否为肿瘤的敏感性、特异性、准确率分别为93.6%,91.7%和93.0%,显著高于常规内镜（P〈0.01）。结论 NBI普通内镜能较准确判断病变的性质,为鉴别是否为肿瘤性病变的更有效的内镜方法。     

智能电子分光染色放大技术在大肠息肉诊断中的价值

染色内镜及放大内镜可鉴别肿瘤性及非肿瘤性息肉,并为临床选择治疗方案提供重要依据。但内镜下色素染色比较麻烦,操作较繁琐,耗时较长。新近开发的智能电子分光技术（FICE）是一种简单易行的黏膜表面观察方法,其采用纳米分光技术,模拟色素染色,可以再现黏膜表层细微结构及毛细血管走向。2007年1月至2011年1月间,我院采用FICE染色放大技术及色素染色放大技术对大肠息肉进行了腺管开口分型及毛细血管形态观察,并与病理组织学诊断相比较,现将结果报道如下。     

窄带成像技术对大肠增生性病变的诊断价值研究

目的探讨窄带光谱成像技术（NBI）对大肠增生性病变的诊断价值。方法在白光及NBI模式下分别对大肠可疑病灶进行观察、诊断,以活检病理学检查结果作为金标准,对比NBI与传统肠镜诊断大肠炎性增生、腺瘤、早癌及进展期肿瘤的敏感性及特异性。采用NBI模式结合放大内镜观察各种大肠增生性病灶的腺管开口分型及病灶表面微血管形态并进行评分,总结NBI下大肠各种增生性病灶的内镜下特点。结果（1）传统肠镜及NBI技术检查280例患者共发现368处病灶,NBI诊断大肠炎性增生、腺瘤及早癌的敏感性及特异性明显高于传统肠镜。（2）NBI下大肠炎性增生的腺管开口多为Ⅰ、Ⅱ型,腺瘤多为Ⅱ、Ⅲ型（共占94．2％）,早癌的腺管开口可为Ⅲ（18．8％）、Ⅳ（56．3％）和Ⅴ型（25．0％）,进展期肿瘤多为Ⅴ型开口（94．0％）。（3）NBI下大肠炎性增生、腺瘤、早癌及进展期恶性肿瘤的微血管形态学平均评分分别为1．35±0．72、3．86±1．07、6．52±2．59和11．42±3．59,评分在6．5分以上病灶高度提示为恶性病灶。结论NBI在鉴别诊断大肠增生性病灶的敏感性及特异性明显高于传统肠镜,NBI结合放大内镜对病灶腺管开口分型及微血管形态的观察能帮助预测病灶的病理性质。     

Comparative study of conventional colonoscopy, chromoendoscopy, and narrow-band imaging systems in differential diagnosis of neoplastic and nonneoplastic colonic polyps

AIM: To identify the feasibility of the narrow-band imaging (NBI) method compared with that of conventional colonoscopy and chromoendoscopy for distinguishing neoplastic and nonneoplastic colonic polyps. METHOD: This study enrolled consecutive patients who underwent colonoscopy using a conventional colonoscope between January and February 2006 at Chang-Gung Memorial Hospital, Linkou Medical Center, Taiwan. These 78 patients had 110 colorectal polyps. During the procedure, conventional colonoscopy first detected lesions, and then the NBI system was used to examine the capillary networks. Thereafter indigo carmine (0.2%) was sprayed directly on the mucosa surface prior to evaluating the crypts using a conventional colonoscope. The pit patterns were characterized using the classification system proposed by Kudo. Finally, a polypectomy or biopsy was performed for histological diagnosis. RESULTS: Of the 110 colorectal polyps, 65 were adenomas, 40 were hyperplastic polyps, and five were adenocarcinomas. The NBI system and pit patterns for all lesions were analyzed. For differential diagnosis of neoplastic (adenoma and adenocarcinoma) and nonneoplastic (hyperplastic) polyps, the sensitivity of the conventional colonoscope for detecting neoplastic polyps was 82.9%, specificity was 80.0% and diagnostic accuracy was 81.8%, significantly lower than those achieved with the NBI system (sensitivity 95.7%, specificity 87.5%, accuracy 92.7%) and chromoendoscopy (sensitivity 95.7%, specificity 87.5%, accuracy 92.7%). Therefore, no significant difference existed between the NBI system and chromoendoscopy during differential diagnosis of neoplastic and nonneoplastic polyps. CONCLUSION: The NBI system identified morphological details that correlate well with polyp histology by chromoendoscopy.     

窄带成像技术在大肠肿瘤性病变与非肿瘤性病变的鉴别诊断中的价值

目的探讨窄带成像技术(narrow band imaging,NBI)在大肠肿瘤性病变与非肿瘤性病变的鉴别诊断中的价值。方法收集2010年1月-2013年10月在梧州红十字会医院内镜室进行结肠镜检查的患者98例,通过普通肠镜、NBI检查结果与病理学检查结果进行对比分析,鉴别诊断大肠肿瘤性病变与非肿瘤性病变。结果 98例患者中共发现136个病变。普通内镜诊断肿瘤性病变的敏感性、特异性及准确性分别为75.5%、78.6%及76.5%;NBI诊断肿瘤性病变的敏感性、特异性及准确性分别为95.7%、95.2%及95.6%,后者明显高于前者,差异有统计学意义(P0.01)。病变轮廓、pit及CP显示清晰度比较,NBI明显优于普通内镜,差异均有统计学意义(P0.01)。结论相对于普通内镜,NBI内镜能更清晰地显示病变的轮廓、腺管开口的分型及微血管的形态,在大肠肿瘤性病变与非肿瘤性病变的鉴别诊断中有重要价值。     

Magnifying Endoscopy with Indigo Carmine Contrast for Differential Diagnosis of Neoplastic and Nonneoplastic Colonic Polyps

This study describes the feasibility of magnifying colonoscopy with indigo carmine dye contrast to distinguish neoplastic and nonneoplastic colonic polyps. This study sampled consecutive patients undergoing colonoscopy using an Olympus CF240ZI from January to October 2000 at Chang-Gung Memorial Hospital, Lin-Kou Medical Center. This study analyzed a total of 270 polyps. Indigo carmine (0.2%) was sprayed directly on the mucosa surface before observing the crypts using a magnifying colonoscope (1.5x-100x). The pit patterns were described using the classification proposed by Kudo. Finally, polypectomy or biopsy was performed for histological diagnosis. The study identified 155 adenomas, 99 hyperplastic polyps, 9 adenocarcinomas, and 7 other nonneoplastic lesions (harmatoma, inflammatory polyps, and mucosal tag). The pit pattern was analyzed for all lesions. Further classification into neoplastic (adenoma and adenocarcinoma) and nonneoplastic (hyperplastic and others) polyps revealed 156 neoplastic and 14 nonneoplastic polyps among the type III to type V pits and 92 nonneoplastic and 8 neoplastic polyps among the type I and II pits. The sensitivity of type III to type V pits in detecting neoplastic polyps was 95.1%, with a specificity of 86.8% and diagnostic accuracy of 91.9%. The positive likelihood ratio was 7.3, and the negative likelihood ratio was 0.06. Magnifying colonoscopy with indigo carmine dye contrast provides morphological detail that correlates well with polyp histology. Small flat lesions with typical type II pit pattern should have minimal neoplastic risk, thus endoscopic resection is not necessary.     

普通窄带成像内镜对结直肠增生性息肉和腺瘤的鉴别诊断价值

目的 分析普通窄带成像(NBI)内镜下结直肠增生性息肉与腺瘤腺管及微血管特征的差异,评价NBI的鉴别诊断价值.方法 将普通内镜下诊断结直肠息肉、病理检查证实为增生性息肉或腺瘤者纳入研究并进行NBI内镜检查.将腺管形态参照改良的工藤分型法分为A型和B型.将微血管形态分为3型,无微血管判为Ⅰ型,微血管沿腺管开口排列、粗细均匀判为Ⅱ型,微血管粗细不均、排列紊乱判为Ⅲ型.比较增生性息肉和腺瘤NBI图像中腺管形态和微血管形态特征的差异,同时对无放大NBI图像观察者间的一致性进行评价.结果 共87例患者的107个息肉(腺瘤73个、增生性息肉34个)进行普通NBI内镜检查.腺瘤组息肉最大径和表面分叶者比例明显高于增生性息肉组(P值分别=0.0023和0.0047).腺瘤组中B型腺管形态[86.3％(63/73)]及Ⅱ或Ⅲ型微血管形态[82.2％(60/73)]者较多.以B型腺管形态、Ⅱ型或Ⅲ型微血管中任一特征诊断腺瘤的敏感度、特异度、准确率分别为97.3％、82.4％、92.5％.以B型腺管形态联合Ⅱ型或Ⅲ型微血管诊断腺瘤的敏感度、特异度、准确率分别为71.2％、91.2％、77.6％.观察者间一致性评价平均Kappa值为0.761.结论 普通NBI内镜下结直肠腺瘤和增生性息肉的微血管特征和腺管特征存在差异,依据以上两方面可在NBI内镜下实时初步鉴别腺瘤和增生性息肉.     

NARROW BAND IMAGING IN THE DETECTION OF COLORECTAL POLYP: KOREAN EXPERIENCE

Background: Although white light (WL) colonoscopy is a gold standard to detect colorectal polyps, substantial polyps are missed. Narrow band imaging (NBI) is a new technology that enables a more detailed visualization of the mucosal surface. The aim of the present study was to determine whether NBI can improve the detection of colorectal polyps. Methods: We prospectively enrolled 188 (M : F = 99:89, 21–80 years) subjects undergoing colonoscopy as a screening procedure in nine referral centers. After a careful WL examination of the whole colorectum, rectosigmoid colon (0–30 cm from the anal verge) was reobserved by NBI. Size, macroscopic morphology, and the histology of all the polyps detected during WL and NBI examination were analyzed. Results: WL examination detected 162 polyps in 188 subjects, of which 106 lesions were neoplastic, while NBI of rectosigmoid colon detected an additional 61 polyps of which eight lesions were neoplastic. Only 10 (6.2%) of 162 polyps discovered during WL examination were flat polyps compared to 10 (16.4%) of 61 newly detected polyps during NBI being flat type (P = 0.002). The mean polyp size detected by NBI was smaller than that found by WL colonoscopy (2.8 ± 1.0 mm vs 6.5 ± 4.5 mm, P < 0.001). Conclusion: Many additional colorectal polyps, especially flat type, could be detected by NBI examination for normal‐looking rectosigmoid mucosa. The role of NBI in colorectal neoplasm screening needs to be further investigated in future studies.