Novel magnetic compression technique for establishment of a canine model of tracheoesophageal fistula

Figure 5 Gross and histological observations. A: Gross specimens of the trachea and esophagus; B: There was no tissue adhesion between the trachea and the esophagus, except around the fistula; C: Gross specimen showing the fistula in the esophagus; D: Gross specimen showing the fistula in the trachea; E and F: Histological analysis demonstrated that the esophageal mucosa (blue arrow) and pseudostratified ciliated columnar epithelium (black arrow) were absent at the site of the fistula.