目的:探讨内镜窄带成像技术(NBI)在咽喉部恶性肿瘤早期诊断中的应用。方法:选取2014年1月至2019年12月温岭市第一人民医院收治的怀疑咽喉部良性或恶性病变患者512例，应用白光内镜检查和NBI内镜检查并取活检，以病理组织学结果为诊断的金标准观察NBI在咽喉部恶性肿瘤早期诊断中的价值。结果:NBI内镜在病变轮廓及黏膜下微血管形态图像显示清晰度优于白光内镜(χn 2＝457.497、293.209，均n P<0.05)。NBI内镜对恶性肿瘤的诊断符合率、灵敏度、阴性符合率均高于白光内镜(χn 2＝10.131、6.197、4.084，均n P<0.05)。NBI内镜Ⅰ～Ⅱ型诊断良性病变的灵敏度90.65%、特异度96.88%，NBI内镜Ⅲ～Ⅳ型诊断轻-中度不典型增生的灵敏度80.99%、特异度97.52%，NBI内镜Ⅴa型诊断重度不典型增生的灵敏度15.18%、特异度98.54%，NBI内镜Ⅴa～c型诊断浸润癌的灵敏度93.24%、特异度96.93%。n 结论:与白光内镜比较，NBI内镜能更清晰显示病变轮廓及黏膜下微血管，能更准确地诊断咽喉部恶性肿瘤，尤其是对癌前病变及早期恶性肿瘤的识别度更高，在咽喉部恶性肿瘤的早期诊断中具有重要的临床应用价值。“,”Objective:To explore the application of endoscopic narrow-band imaging(NBI) in the early diagnosis of throat malignant tumors.Methods:From January 2014 to December 2019, 512 patients with suspected benign or malignant diseases of the throat in the First People's Hospital of Wenling were selected, and all patients were performed white light endoscopy and NBI endoscopy.The biopsies were taken for pathological examination.The histopathological results were seemed as gold standard for diagnosis.Results:NBI endoscopy was superior to white light endoscope in terms of microvascular morphology and lesion outline(χn 2=457.497, 293.209, all n P<0.05). The diagnostic coincidence rate, sensitivity and negative coincidence rate of NBI endoscope for malignant tumors were higher than those of white light endoscope(χn 2=10.131, 6.197, 4.084, all n P<0.05). The sensitivity of NBI endoscope type Ⅰ-Ⅱ in the diagnosis of benign lesions was 90.65%, and the specificity was 96.88%.The sensitivity and specificity of NBI endoscope type Ⅲ-Ⅳ in the diagnosis of mild-moderate dysplasia were 80.99% and 97.52%, respectively.The sensitivity and specificity of NBI endoscopy type Va in the diagnosis of severe atypical hyperplasia were 15.18% and 98.54%, respectively.The sensitivity and specificity of NBI endoscope Va-c in the diagnosis of invasive cancer were 93.24% and 96.93%, respectively.n Conclusion:Compared with white light endoscope, NBI endoscope can more clearly show the outline of lesions and submucosal blood vessels, and can more accurately diagnose malignant tumors in the throat, especially can more recognized the pre-cancerous lesions and early malignant tumors.It has important clinical application value in early diagnosis of malignant tumor in the throat.