Value of Sputum Cytology for Postoperative Patients Underwent Fiberoptic Bronchoscopy in Diagnosis of Lung Cancer

Objective To explore the value of sputum cytology in the diagnosis of lung cancer for postoperative patients who underwent fiberoptic bronchoscopy.Methods 120 patients accepted 2-3 sputum cytological examinations before fiberoptic bronchoscopy and 1-4 days after fiberoptic bronchoscopy.Results Among the 120 cases 79 cases were diagnosed as lung cancer,75 cases were confirmed by different examinations including sputum cytology before fiberoptic bronchoscopy,brush cytology,biopsy,liquid washing and postoperative sputum cytology.23 cases of cancer were found in preoperative sputum cytology,the positive rate was 29.1%,the cytotyping accuracy was 63.6% in squamous carcinoma,60.0% in adenocarcinoma and 66.7% in small cell carcinoma.42 cases of cancer were found in postoperative sputum cytology,the positive rate was 53.2%,the cytotyping accuracy was 87.5% in squamous carcinoma,88.2% in adenocarcinoma and 83.3% in small cell carcinoma.Conclusion Sputum cytology for postoperative patients who underwent fiberoptic bronchoscopy can increase the detectable rate of lung cancer.The positive rate and accuracy of postoperative sputum cytology are better than that of preoperative sputum cytology.The postoperative sputum cytology is noninvasive,safe and repeatable,it is worthy of clinical application.