Objective To investigate the pathological features and prognostic analysis in endoscopic strip-ping microflap excision of vocal cords leukoplakia.Methods A total of 186 cases with vocal cord leukoplakia and treated by endoscopic stripping microflap excision were retrospectively analyzed,calculated the ratios of recurrence and malignant transformation on keratosis without dysplasia,mild dysplasia,moderate dysplasia and severe dysplasia and carcinoma in situ.Then,the association of histopathological classification with recurrence and malignant transformation in vocal cord leukoplakia were evaluated.Results 87 cases of all 186 patients with vocal cord leukoplakia were kera-tosis without dysplasia,17 cases were recurrenced and 3 cases were developed to carcinoma;64 cases were mild dysplasia,15 cases were recurrenced and 7 cases were developed to carcinoma;29 cases were moderate dysplasia, 13 cases were recurrenced and 10 cases were developed to carcinoma;6 cases were severe dysplasia and carcinoma in situ,all 6 cases were recurrenced and 5 cases were developed to carcinoma.Conclusion The histopathological classi-fication is predictive factor for the risk of recurrence and malignant transformation in vocal cord leukoplakia.

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(χ 2=457.497, 293.209, all 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(χ 2=10.131, 6.197, 4.084, all 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. 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.