Objective To observe the effectiveness of Lugol's chromoendoscopy of the entire e-sophagus on the diagnosis of advanced esophageal carcinoma. Methods Four-hundred and forty patients with advanced esophageal carcinoma were examined with lugols chromoendoscopy preoperatively. Biopsy was taken from non-stained area. The specimen obtained after esophagectomy were sectioned in sub-series. Results Abnormal stains were observed in 55 cases( 12. 5% )including 48 with multifocus,4 with extended lesions and 3 with both. The patterns of esophagectomy were changed in 51 cases due to abnormal finding of stains. Compared with the pathology specimen, the sensitivity and specificity of the stain for multifocus were 97. 9% and 85. 2% respectively. Conclusion It is useful in the patients with advanced esophageal carcinoma to perform a Lugol' s chromoendoscopy . More detailed information might obtain from the examination , particularly in finding out the multifocus lesions and outlining the extent of lesion.

Objective To study the application of regional localization method in the thoracoscopic resection of small pulmonary nodule.Methods Sixty-eight cases of small pulmonary nodules were located by applying the small pulmonary nodules regional localization method,and the clinical effect was intraoperatively observed.The ROC curve was used to find the best node for the nodule maximum diameter and minimum distance from the pleural.Results The once successful localization was obtained in 65 cases with the success rate of 95.6％.The best node of the maximum diameter of small pulmonary nodules was 1.0 cm,and the shortest distance from the pleura was 1.3 cm.Conclusion The regional localization method in the thoracoscopic resection of small pulmonary nodule has high accuracy.