Could near focus endoscopy,narrow-band imaging,and acetic acid improve the visualization of microscopic features of stomach mucosa?

BACKGROUND Conventional magnifying endoscopy with narrow-band imaging(NBI)observation of the gastric body mucosa shows dominant patterns in relation to the regular arrangement of collecting venules,subepithelial capillary network,and gastric pits.AIM To evaluate the effectiveness of a new one-dual(near)focus,NBI mode in the assessment of the microscopic features of gastric body mucosa compared to conventional magnification.METHODS During 2021 and 2022,68 patients underwent proximal gastrointestinal endoscopy using magnification endoscopic modalities subsequently applying acetic acid(AA).The GIF-190HQ series NBI system with dual focus capability was used for the investigation of gastric mucosa.At the time of the endoscopy,the gastric body mucosa of all enrolled patients was photographed using the white light endoscopy(WLE),near focus(NF),NF-NBI,AA-NF,and AA-NF-NBI modes.RESULTS The WLE,NF and NF-NBI endoscopic modes for all patients(204 images)were classified in the same order into three groups.Two images from each patient for the AA-NF and AA-NF-NBI endoscopic modes were classified in the same order.According to all three observers who completed the work independently,NF magnification was significantly superior to WLE(P<0.01),and the NF-NBI mode was significantly superior to NF magnification(P<0.01).After applying AA,the three observers confirmed that AA-NF-NBI was significantly superior to AA-NF(P<0.01).Interobserver kappa values for WLE were 0.609,0.704,and 0.598,respectively and were 0.600,0.721,and 0.637,respectively,for NF magnification.For the NF-NBI mode,the values were 0.378,0.471,and 0.553,respectively.For AA-NF,they were 0.453,0.603,and 0.480,respectively,and for AA-NF-NBI,they were 0.643,0.506,and 0.354,respectively.CONCLUSION When investigating gastric mucosa in microscopic detail,NF-NBI was the most powerful endoscopic mode for assessing regular arrangement of collecting venules,subepithelial capillary network,and gastric pits among the five endoscopic modalities investigated in this study.AA-NF-NBI was the most powerful endoscopic mode for analyzing crypt opening and intervening part.

Simplified criteria for diagnosing superficial esophageal squamous neoplasms using Narrow Band Imaging magnifying endoscopy

AIM To simplify the diagnostic criteria for superficial esophageal squamous cell carcinoma(SESCC) on Narrow Band Imaging combined with magnifying endoscopy(NBI-ME).METHODS This study was based on the post-hoc analysis of a randomized controlled trial. We performed NBI-ME for 147 patients with present or a history of squamous cell carcinoma in the head and neck, or esophagus between January 2009 and June 2011. Two expert endoscopistsdetected 89 lesions that were suspicious for SESCC lesions, which had been prospectively evaluated for the following 6 NBI-ME findings in real time: "intervascular background coloration"; "proliferation of intrapapillary capillary loops(IPCL)"; and "dilation", "tortuosity", "change in caliber", and "various shapes(VS)" of IPCLs(i.e., Inoue's tetrad criteria). The histologic examination of specimens was defined as the gold standard for diagnosis. A stepwise logistic regression analysis was used to identify candidates for the simplified criteria from among the 6 NBI-ME findings for diagnosing SESCCs. We evaluated diagnostic performance of the simplified criteria compared with that of Inoue's criteria.RESULTS Fifty-four lesions(65%) were histologically diagnosed as SESCCs and the others as low-grade intraepithelial neoplasia or inflammation. In the univariate analysis, proliferation, tortuosity, change in caliber, and VS were significantly associated with SESCC(P < 0.01). The combination of VS and proliferation was statistically extracted from the 6 NBI-ME findings by using the stepwise logistic regression model. We defined the combination of VS and proliferation as simplified dyad criteria for SESCC. The areas under the curve of the simplified dyad criteria and Inoue's tetrad criteria were 0.70 and 0.73, respectively. No significant difference was shown between them. The sensitivity, specificity, and accuracy of diagnosis for SESCC were 77.8%, 57.1%, 69.7% and 51.9%, 80.0%, 62.9% for the simplified dyad criteria and Inoue's tetrad criteria, respectively.CONCLUSION The combination of proliferation and VS may serve as simplified criteria for the diagnosis of SESCC using NBIME.

Diagnostic utility of narrow-band imaging endoscopy for pharyngeal superfi cial carcinoma

AIM: To investigate the endoscopic features of pharyngeal superfi cial carcinoma and evaluate the utility of narrow-band imaging (NBI) for this disease. METHODS: In the present prospective study, 335 patients underwent conventional white light (CWL) en-doscopy and non-magnifi ed/magnifi ed NBI endoscopy, followed by an endoscopic biopsy, for 445 superfi cial lesions in the oropharynx and hypopharynx. The macroscopic appearance of superfi cial lesions was categorized as either elevated (< 5 mm in height), flat, or depressed (not ulcerous). Superficial carcinoma (SC) was defi ned as a superfi cial lesion showing high-grade dysplasia or squamous cell carcinoma on histology. The color, delineation, and macroscopic appearances of the lesions were evaluated by CWL endoscopy. The ratio of the brownish area/intervascular brownish epithelium (IBE), as well as microvascular proliferation, dilation, and irregularities, was determined by non-magnifi ed/ magnifi ed NBI endoscopy. An experienced pathologist who was unaware of the endoscopic fi ndings made the histological diagnoses. By comparing endoscopic fi ndings with histology, we determined the endoscopic features of SC and evaluated the diagnostic utility of NBI. RESULTS: The 445 lesions were divided histologically into two groups: a non-SC group, including non-neoplasia and low-grade dysplasia cases, and an SC group. Of the 445 lesions examined, 333 were classified as non-SC and 112 were classif ied as SC. There were no significant differences in age, gender, or the location of the lesions between the patients in the two groups. The mean diameter of the SC lesions was signif icantly greater than that of non-SC lesions (11.0 ± 7.6 mm vs 4.6 ± 3.6 mm, respectively, P < 0.001). Comparisons of CWL endoscopy fi ndings for SC and non-SC lesions by univariate analysis revealed that the incidence of redness (72% vs 41%, respectively, P < 0.001) and a flat or depressed type of lesion (58% vs 44%, respectively, P = 0.013) was significantly higher in the SC group. Using non-magnifi ed NBI endoscopy, the incidence of a brownish area was signifi cantly higher for SC lesions (79% vs 57%, respectively, P < 0.001). On magnifi ed NBI endoscopy, the incidence of IBE (68% vs 33%, P < 0.001) and microvascular proliferation (82% vs 51%, P < 0.001), dilation (90% vs 76%, P =0.002), and irregularity (82% vs 31%, P < 0.001) was also signifi cantly higher for the SC compared with the non-SC lesions. Multivariate analysis revealed that the incidence of redness (P = 0.022) on CWL endoscopy and IBE (P < 0.001) and microvascular irregularities (P < 0.001) on magnif ied NBI endoscopy was signif icantly higher in SC than non-SC lesions. Redness alone exhibited signifi cantly higher sensitivity and signifi cantly lower specifi city for the diagnosis of SC compared with redness plus IBE and microvascular irregularities (72% vs 52%, P = 0.002; and 59% vs 92%, P < 0.001, respectively). The accuracy of redness plus IBE and irregularities for the diagnosis of SC was signifi cantly greater than using redness alone (82% vs 62%, respectively, P < 0.001). CONCLUSION: Redness, IBE, and microvascular irregularities appear to be closely related to SC lesions. Magnifi ed NBI endoscopy may increase the diagnostic accuracy of CWL endoscopy for SC.

Randomised controlled trial comparing modified Sano's and narrow band imaging international colorectal endoscopic classifications for colorectal lesions

AIM To assess the utility of modified Sano′s(MS) vs thenarrow band imaging international colorectal endoscopic(NICE) classification in differentiating colorectal polyps.METHODS Patients undergoing colonoscopy between 2013 and 2015 were enrolled in this trial.Based on the MS or the NICE classifications,patients were randomised for real-time endoscopic diagnosis.This was followed by biopsies,endoscopic or surgical resection.The endoscopic diagnosis was then compared to the final(blinded) histopathology.The primary endpoint was the sensitivity(Sn),specificity(Sp),positive predictive value(PPV) and negative predictive value(NPV) of differentiating neoplastic and non-neoplastic polyps(MSⅡ/Ⅱo/Ⅲa/Ⅲb vs I or NICE 1 vs 2/3).The secondary endpoints were "endoscopic resectability"(MSⅡ/Ⅱo/Ⅲa vs Ⅰ/Ⅲb or NICE 2 vs 1/3),NPV for diminutive distal adenomas and prediction of post-polypectomy surveillance intervals.RESULTS A total of 348 patients were evaluated.The Sn,Sp,PPV and NPV in differentiating neoplastic polyps from non-neoplastic polyps were,98.9%,85.7%,98.2% and 90.9% for MS;and 99.1%,57.7%,95.4% and 88.2% for NICE,respectively.The area under the receiver operating characteristic curve(AUC) for MS was 0.92(95%CI:0.86-0.98);and AUC for NICE was 0.78(95%CI:0.69,0.88).The Sn,Sp,PPV and NPV in predicting "endoscopic resectability" were 98.9%,86.1%,97.8% and 92.5% for MS;and 98.6%,66.7%,94.7% and 88.9% for NICE,respectively.The AUC for MS was 0.92(95%CI:0.87-0.98);and the AUC for NICE was 0.83(95%CI:0.75-0.90).The AUC values were statistically different for both comparisons(P = 0.0165 and P = 0.0420,respectively).The accuracy for diagnosis of sessile serrated adenoma/polyp(SSA/P) with high confidence utilizing MS classification was 93.2%.The differentiation of SSA/P from other lesions achieved Sp,Sn,PPV and NPV of 87.2%,91.5%,89.6% and 98.6%,respectively.The NPV for predicting adenomas in diminutive rectosigmoid polyps(n = 150) was 96.6% and 95% with MS and NICE respectively.The calculated accuracy of post-polypectomy surveillance for MS group was 98.2%(167 out of 170) and for NICE group was 92.1%(139 out of 151).CONCLUSION The MS classification outperformed the NICE classification in differentiating neoplastic polyps and predicting endoscopic resectability.Both classifications met ASGE PIVI thresholds.

Narrow-band imaging observation of colorectal lesions using NICE classification to avoid discarding significant lesions

AIM: To assess the risk of failing to detect diminutive and small colorectal cancers with the "resect and discard" policy.METHODS: Patients who received colonoscopy and polypectomy were recruited in the retrospective study. Probable histology of the polyps was predicted by six colonoscopists by the use of NICE classification. The incidence of diminutive and small colorectal cancersand their endoscopic features were assessed. RESULTS: In total, we found 681 cases of diminutive(1-5 mm) lesions in 402 patients and 197 cases of small(6-9 mm) lesions in 151 patients. Based on pathology of the diminutive and small polyps, 105 and 18 were non-neoplastic polyps, 557 and 154 were low-grade adenomas, 18 and 24 were high-grade adenomas or intramucosal/submucosal(SM) scanty invasive carcinomas, 1 and 1 were SM deeply invasive carcinoma, respectively. The endoscopic features of invasive cancer were classified as NICE type 3 endoscopically.CONCLUSION: The risk of failing to detect diminutive and small colorectal invasive cancer with the "resect and discard" strategy might be avoided through the use of narrow-band imaging observation with the NICE classification scheme and magnifying endoscopy.

白光内镜与窄带成像技术放大内镜联合检查对胃癌的诊断价值

目的 探讨白光内镜与窄带成像技术(NBI)放大内镜联合检查对胃癌的诊断价值。方法 选取119例疑似胃癌患者,均进行白光内镜、NBI放大内镜及病理检查。采用Kappa一致性检验评估白光内镜、NBI放大内镜单独及联合检查诊断胃癌的结果与病理检查结果的一致性。绘制受试者工作特征(ROC)曲线,计算曲线下面积(AUC),分析白光内镜、NBI放大内镜单独及联合检查对胃癌的诊断价值。比较白光内镜与NBI放大内镜的图像质量及内镜下胃癌和胃部良性疾病的特征。结果 经病理检查,119例患者中,胃癌患者57例,胃部良性疾病患者62例。白光内镜、NBI放大内镜单独及联合检查诊断胃癌的结果与病理检查结果均具有良好的一致性(Kappa=0.645、0.731、0.781,P﹤0.05)。白光内镜、NBI放大内镜单独及联合检查诊断胃癌的AUC分别为0.821、0.890、0.896,均具有中等诊断价值,其中白光内镜和NBI放大内镜联合检查的AUC最高。NBI放大内镜检查在病灶边界、胃黏膜表面形态、微血管情况方面的图像质量评分均明显高于白光内镜检查,差异均有统计学意义(P﹤0.01)。白光内镜与NBI放大内镜联合检查显示,胃癌患者中病灶边界线清晰、黏膜微血管不规则、表面腺管不规则、腺间距加宽比例均明显低于胃部良性疾病患者,差异均有统计学意义(P﹤0.01)。结论 白光内镜与NBI放大内镜联合检查对胃癌具有较好的诊断价值,可提供较为清晰的图像,且胃癌在白光内镜联合NBI放大内镜下可见较为明显的典型表现,能够为临床诊断提供参考。

窄带成像放大内镜检查对结肠癌癌前病变的诊断价值

目的探讨窄带成像放大内镜(NBI-ME)检查对结肠癌癌前病变的诊断价值。方法选取106例疑似结肠癌癌前病变患者,均接受NBI-ME、白光内镜检查,以手术病理检查结果为金标准,评估NBI-ME、白光内镜检查对结肠癌癌前病变的诊断价值。NBI-ME、白光内镜检查诊断结肠癌癌前病变的结果与病理检查结果的一致性采用Kappa检验。比较NBI-ME、白光内镜检查的图像清晰度。结果病理检查结果显示,阳性(结肠癌癌前病变)92例,阴性14例(其中结肠腺瘤2例,结肠息肉12例)。NBI-ME检查诊断结肠癌癌前病变的灵敏度为96.74%,特异度为92.86%,准确度为96.23%,其与病理检查结果的一致性较好(Kappa=0.772);白光内镜检查诊断结肠癌癌前病变的灵敏度为78.26%,特异度为50.00%,准确度为74.53%,其与病理检查结果的一致性一般(Kappa=0.596);NBI-ME检查诊断结肠癌癌前病变的灵敏度、特异度、准确度均高于白光内镜检查。NBI-ME检查的图像清晰度评分为(3.67±0.22)分,明显高于白光内镜检查的(2.97±0.41)分,差异有统计学意义(P﹤0.01)。结论NBI-ME检查诊断结肠癌癌前病变的价值较高,诊断灵敏度、特异度、准确度均高于白光内镜检查。

Gastric adenocarcinoma of fundic gland type: Five cases treated with endoscopic resection

Recently,a new disease entity termed gastric adenocarcinoma of fundic gland type(GA-FG) was proposed.We treated five cases of GA-FG with endoscopic submucosal dissection.All tumors were small and located in the upper third of the stomach.Four tumors were macroscopically identified as 0-IIa and one was identified as 0-Ⅱb.Narrow-band imaging with magnifying endoscopy showed an irregular microvascular pattern in 2 cases and a regular microvascular pattern in the remainder.All tumors arose from the deep layer of the lamina propria mucosae and showed submucosal invasion.Lymphatic invasion was seen only in one case,while no venous invasion was recognized.All tumors were positive for pepsinogen-Ⅰ and MUC6 by immunohistochemistry.None showed p53 overexpression,and the labeling index of Ki-67 was low in all cases.All cases have been free from recurrence or metastasis.Herein,we discussed the clinicopathological features of GA-FG in comparison with past reports.

Endoscopic diagnosis and management of type I neuroendocrine tumors

Type I gastric neuroendocrine tumors(TI-GNETs) are related to chronic atrophic gastritis with hypergastrinemia and enterochromaffin-like cell hyperplasia. The incidence of TI-GNETs has significantly increased, with the great majority being TI-GNETs. TI-GNETs present as small(< 10 mm) and multiple lesions endoscopically and are generally limited to the mucosa or submucosa. Narrow band imaging and high resolution magnification endoscopy may be helpful for the endoscopic diagnosis of TI-GNETs. TI-GNETs are usually histologically classified by World Health Organization criteria as G1 tumors. Therefore, TI-GNETs tend to display nearly benign behavior with a low risk of progression or metastasis. Several treatment options are currently available for these tumors, including surgical resection, endoscopic resection, and endoscopic surveillance. However, debate persists about the best management technique for TIGNETs.

ME-BLI对幽门螺杆菌根除后胃早癌的诊断价值

目的分析放大内镜联合蓝激光成像技术(ME-BLI)诊断幽门螺杆菌根除后胃早癌的准确性,并评价其临床应用价值。方法以2019~2022年武汉市第一医院收治的90例经幽门螺杆菌根除治疗后1~2年,幽门螺杆菌检测为阴性,普通白光内镜检查疑似胃黏膜病变的患者为研究对象。所有患者行ME-BLI检查,并以病理学检查结果作为判断金标准,对比普通白光内镜和ME-BLI对胃早癌的诊断效率。结果62例患者经病理学检测确诊为胃早癌。ME-BLI对幽门螺杆菌根除后胃早癌的诊断敏感度、特异度、阳性预测值、阴性预测值和总体准确率均明显高于普通白光内镜,差异均有统计学意义(均P<0.05)。与普通白光内镜相比,ME-BLI对于胃黏膜病变的边界线(DL)、不规则黏膜微血管(MV)、不规则的表面微结构(MS)有更好的显示,差异均有统计学意义(均P<0.01)。结论ME-BLI对幽门螺杆菌根除后胃早癌具有良好的诊断价值,有助于提高胃早癌的临床诊断效率。

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

目的探讨早期胃癌诊疗中白光内镜、放大内镜及放大内镜联合窄带成像技术的应用价值。方法回顾性选取2019年3月至2022年3月三二〇一医院疑似早期胃癌患者320例,统计3种检查方法的检测结果,分析320例早期胃癌患者的临床与病理特征,并分析早期胃癌患者微血管分型、微腺管分型与临床病理特征的相关性。结果放大内镜联合窄带成像技术诊断早期胃癌的灵敏性(80.00%)明显高于白光内镜(65.00%)和放大内镜(75.00%),差异有统计学意义(P<0.05),放大内镜检查的灵敏性明显高于白光内镜,差异有统计学意义(P<0.05),但三者的特异性、准确性、阳性预测值、阴性预测值之间的差异均无统计学意义(P>0.05)。分化程度为分化型患者的微血管分型FNP、ILL-1比率均明显高于未分化型患者,ILL-2、CSP比率均明显低于未分化型患者,差异均有统计学意义(P<0.05);镜下分型隆起型患者的微血管分型FNP、ILL-1比率均明显高于凹陷型或平坦型患者,ILL-2、CSP比率均明显低于凹陷型或平坦型患者,差异均有统计学意义(P<0.05)。未分化型患者的微腺管分型Ⅳ型、Ⅴ型比率均明显高于未分化型,Ⅵ型比率明显低于未分化型,差异均有统计学意义(P<0.05)。结论放大内镜联合窄带成像技术在早期胃癌诊疗中的应用价值明显高于白光内镜和放大内镜。

窄带成像放大内镜联合超声小探头在早期胃癌及癌前病变诊疗中的价值

目的探讨窄带成像放大内镜(NBI-ME)联合超声小探头在早期胃癌(EGC)或癌前病变中的诊疗价值。方法收集山西白求恩医院2015年1月至2020年12月收治的行内镜下黏膜剥离术(ESD)且术后病理证实为癌前病变或EGC的88例病人的临床资料。以ESD术后获得的标本组织病理学诊断结果为金标准,判断NBI-ME和超声内镜(EUS)检查的准确性、灵敏度及特异度;同时分析NBI-ME的判断结果、超声小探头对病变浸润深度的判断结果及NBI-ME靶向活检结果与ESD术后病理学结果的一致性,并计算Kappa值及总准确率。结果NBI-ME诊断EGC的灵敏度为78.79%、特异度为90.91%,总准确率高达86.36%,与术后病理结果比较一致性较好(P<0.05,Kappa=0.706);NBI-ME靶向活检病理诊断与术后病理诊断结果一致的共77例,总准确率为87.5%,与术后病理结果比较一致性较好(P<0.05,Kappa=0.755);EUS预判结果与术后病理结果一致的共79例,总准确率高达89.77%,与术后病理结果比较一致性较好(P<0.05,Kappa=0.611)。结论NBI-ME能清晰地显示病变黏膜的表面微结构和微血管结构,提高了EGC及癌前病变的检出率,结合超声小探头能较好地判断浸润深度,为病人选择最佳治疗方案,改善病人预后及远期生存质量。

Update on diagnosis and treatment of early signet-ring cell gastric carcinoma: A literature review

Gastric signet-ring cell gastric carcinoma(GSRC)is an unfavorable subtype of gastric cancer(GC)that presents with greater invasiveness and poorer prognosis in advanced stage than other types of GC.However,GSRC in early stage is often considered an indicator of less lymph node metastasis and more satisfying clinical outcome compared to poorly differentiated GC.Therefore,the detection and diagnosis of GSRC at early stage undoubtedly play a crucial role in the management of GSRC patients.In recent years,technological advancement in endoscopy including narrow-band imaging and magnifying endoscopy has significantly improved the accuracy and sensitivity of the diagnosis under endoscopy for GSRC patients.Researches have confirmed that early stage GSRC that meets the expanded criteria of endoscopic resection showed comparable outcomes to surgery after receiving endoscopic submucosal dissection(ESD),indicating that ESD could be considered standard treatment for GSRC after thorough selection and evaluation.This article summarizes the current knowledge and updates pertaining to the endoscopic diagnosis and treatment of early stage signet-ring cell gastric carcinoma.

超声内镜检查联合放大内镜结合窄带成像检查对早期食管癌及其浸润深度的诊断价值

目的 探讨超声内镜检查(EUS)联合放大内镜结合窄带成像(ME-NBI)检查对早期食管癌(EEC)及其浸润深度的诊断价值。方法 收集71例高度怀疑为EEC患者的病历资料,以病理检查结果为金标准,分析EUS、ME-NBI单独及联合检查对EEC及其浸润深度的诊断价值。结果 病理检查结果显示,EEC患者55例,食管癌前病变患者16例。以病理检查结果为金标准,EUS联合ME-NBI检查诊断EEC的灵敏度、特异度及准确度分别为90.91%、100%、92.96%,均高于EUS、ME-NBI单独检查。EUS联合ME-NBI检查对浸润深度M1-M2、M3-SM1 EEC的检出率分别为96.15%、89.47%,均高于EUS、ME-NBI单独检查,差异均有统计学意义(P<0.05)。结论EUS联合ME-NBI检查对EEC及其浸润深度均具有较高的诊断价值,可为临床诊断和治疗提供参考。

NBI联合放大内镜对早期胃癌的观察分析

目的采用窄带成像技术(narrow-band imaging,NBI)联合放大内镜对可疑胃早癌病变进行观察,分析比较其对早期胃癌(early gastric cancer,EGC)的诊断价值。方法普通白光观察到的可疑EGC 87例,留取组织学标本,利用NBI结合放大内镜观察,根据可疑病变部位黏膜表面形态、黏膜下微血管形态进行二次观察,并行组织病理学检查,分析比较两种方法的诊断符合率、敏感性及特异性。结果普通内镜组确诊癌性病变14例,NBI结合放大内镜确诊癌性病变17例。癌性病变的诊断符合率、敏感性及特异性NBI放大内镜组(96.55%、89.47%、98.53%)均高于普通胃镜组(89.66%、73.68%、94.12%),差异均有统计学意义(P<0.05)。结论与普通内镜相比,NBI结合放大内镜可提高EGC的诊断符合率、敏感性及特异性。

窄带成像放大内镜指导靶向活检对早期食管癌诊断的临床价值

目的评估窄带成像放大内镜(ME-NBI)在早期食管癌诊断中指导靶向活检的临床价值。方法将2015年10月-2017年12月经普通白光内镜(C-WLI)检查发现食管黏膜早期病变并取得病理的患者纳入研究,进一步行ME-NBI精查并指导靶向活检,有一次病理诊断阳性者即行内镜下治疗。以内镜下切除后病理结果为金标准,比较两种内镜指导病理的诊断准确度。结果 (1)研究共纳入91例患者,其中4例术前病理均为黏膜炎症,未行内镜下治疗,余87例均行内镜下切除,C-WLI指导病理、ME-NBI靶向病理与术后病理比较,总体符合率由18.39%(16/87)提高为88.50%(77/87),差异有统计学意义(P<0.05);(2)对早期食管癌和高级别上皮内瘤变(HGIN)的诊断,ME-NBI靶向病理与C-WLI指导病理的灵敏度分别为92.18%和33.33%,准确度分别为91.67%和60.86%,差异均有统计学意义(P<0.05);(3) ME-NBI通过观察毛细血管袢(IPCL)变化可以评价病变浸润深度,对术前评估起到指导性作用。结论对于早期食管癌的诊断,ME-NBI指导靶向病理结果明显优于C-WLI指导病理,故ME-NBI内镜可作为早期食管病变精查和评价病变浸润深度的检查方法。

电子内镜窄带成像与自体荧光成像系统的选型研究

目的:为医院配备电子内镜窄带成像与自体荧光成像系统选型提供依据,并为广大内镜工作者诊断提供参考价值。方法:探讨了电子内镜窄带成像技术与自体荧光成像技术原理、系统配置、技术参数、临床应用及选型论证。结果:NBI与AFI技术的主要区别是:NBI和AFI系统都在冷光源上配置了窄带干涉滤光片,但是AFI系统则需采用专用的荧光内镜;共同点是:都是通过不同波长及带宽的RGB三色光激发消化道病变,获取对病变组织特异性和敏感性的图像信息。结论:NBI与AFI作为当前最先进的电子内镜成像系统各有优势,医院在选择购置这2套电子内镜系统时,可以根据医院的计划投入成本,科学地选择一款性价比较高的电子内镜系统。

窄带成像结合放大内镜在慢性萎缩性胃炎诊断中的应用

目的探讨窄带成像结合放大内镜(NBI-ME)在慢性萎缩性胃炎(CAG)诊断中的应用价值。方法比较经普通白光胃镜和ME-NBI诊断为CAG患者的胃镜和组织学检查结果。结果普通白光胃镜诊断CAG患者108例中最终经组织学检查确诊者49例,诊断符合率为45.37%。NBI-ME诊断CAG患者83例中最终经组织学检查确诊者65例,诊断符合率为78.31%后者高于前者(P<0.05)。伴肠上皮化生型CAG在普通白光胃镜组的检出率为18.52%,在NBI-ME组的检出率为37.35%,NBI-ME组高于普通白光胃镜组(P<0.05)。结论NBI-ME诊断CAG与组织学的符合率比普通白光胃镜高对伴肠上皮化生型CAG的符合率更高。

窄带成像结合放大内镜对110例结肠息肉的观察分析

目的运用窄带成像(NBI)结合放大内镜对结肠息肉进行观察分析,比较其在腺管开口形态及病理学类型的差异。方法肠息肉患者110例,共留取147个病理组织学活检样本,利用NBI结合放大内镜技术观察结肠息肉腺管开口类型、微血管形态与肿瘤性息肉的关系,并与病理组织学比较,分析肿瘤性息肉的诊断符合率、敏感性及特异性。结果肿瘤性息肉的腺管分型多为Ⅲ、Ⅳ、Ⅴ型。对肿瘤性息肉的诊断符合率、敏感性及特异性(91.16%、88.37%、95.08%)均高于普通肠镜(80.27%、79.07%、81.97%),且NBI放大内镜诊断上皮内瘤变及早癌的准确率也明显高于普通内镜,差异均有统计学意义。结论 NBI结合放大内镜能更清楚地观察到息肉表面的腺管开口及表面微血管形态,有利于结肠息肉样肿瘤性病变的诊断。

联合内镜诊断模型在早期食管癌诊断中的应用价值探讨

目的探讨全新联合内镜诊断模型在提高早期食管癌诊断率中的应用价值。方法选取2018年1月至2019年1月期间就诊福建省食管癌早诊早治促进联盟中高发区多家医院疑诊早期食管癌/癌前病变患者共206例作为研究对象。根据病理诊断结果分为高级别上皮内瘤变/食管癌组和炎症/低级别上皮内瘤变组,对比超声内镜(EUS)、碘染色素内镜及放大电子染色内镜(ME-NBI)在早期食管癌中的诊断价值,并建立多种联合内镜诊断模型,创建受试者工作特征曲线(ROC曲线)评价其对早期食管癌的诊断价值。结果三种内镜诊断早期食管癌的敏感度依次为93.6%、83.2%及73.6%;特异度分别为37.0%、25%及55.6%;准确度分别为86.4%、82.0%及72.8%。单因素分析显示各内镜下表现(浸润深度、IPCL分型、碘染情况、草席征)对早期食管癌有鉴别意义(P<0.05)。在校准年龄、性别、病灶位置等因素后,纳入上述影响因素的联合内镜诊断模型诊断早期食管癌的灵敏度、特异度和准确度分别为95.6%、89.1%和80.6%,ROC曲线下面积为0.951。结论多种内镜联合诊断明显优于单一的内镜检查方法,结合EUS、ME-NBI、碘染色素内镜的联合内镜诊断模型可明显提高早期食管癌的诊断准确性。