Extraesophageal saline enhances endoscopic ultrasonography to differentiate esophagus and adjacent organs

Figure 5 Findings of exploratory thoracotomy. A: Saline containing methylene blue dye deposited in the space between the trachea and the esophagus; B: Saline containing methylene blue dye deposited in the esophageal-aortic space and posterior thoracic aortic tissue; C: Saline containing methylene blue dye deposited in the posterior bronchial tissue (the space between the esophagus and the bronchial bifurcation). Thick and longitudinal lymphatic vessels dyed with methylene blue were also easily visualized; D: Saline containing methylene blue dye deposited in the pretracheal space.