Sliding Sign Using Convex Probe Endobronchial Ultrasound Predicts Tracheobronchial Invasion in Advanced Esophageal Cancer

Background: Accurate assessment of the degree of tumor invasion of the tracheobronchial wall in esophageal cancer is a pivotal factor influencing treatment decisions. In addition to radiological modalities, such as computed tomography and magnetic resonance imaging, bronchoscopy is a valuable tool for staging purposes. Due to the increasing availability of convex probe endobronchial ultrasound (CP-EBUS), obtaining esophageal findings has recently become more feasible. This study aimed to evaluate the efficacy of the CP-EBUS sliding sign for predicting tracheobronchial invasion.