Recent studies have suggested the usefulness of preoperative bronchoscopic marking techniques for the localization of pulmonary nodules in thoracic surgery. This systematic review and meta-analysis aimed to evaluate the efficacy and safety of preoperative bronchoscopic marking.
The PubMed and Cochrane Library databases were searched for clinical studies evaluating preoperative bronchoscopic marking for pulmonary resection. Non-comparative and random effects model-based meta-analyses were conducted to calculate the pooled success and complication rates of bronchoscopic marking.
Twenty-five eligible studies were included. Among these, 15 studies conducted dye marking under electromagnetic navigation bronchoscopy, 4 used virtual-assisted lung mapping and 7 used other marking methods. The overall pooled successful marking rate, successful resection rate and complete resection rate were 0.97 [95% confidence interval (CI) 0.95-0.99], 0.98 (95% CI 0.96-1.00) and 1.00 (95% CI 1.00-1.00), respectively. The overall pooled rates of pleural injury and pulmonary haemorrhage were 0.02 (95% CI 0.01-0.05) and 0.00 (95% CI 0.00-0.00), respectively.
This meta-analysis demonstrated that bronchoscopic marking is very safe and effective. Bronchoscopic marking should be considered, especially if there are concerns about the safety of other localization methods.

© The Author(s) 2020. Published by Oxford University Press on behalf of the European Association for Cardio-Thoracic Surgery. All rights reserved.