Fig. 3.
Tracheoesophageal fistula through a necrotic paraesophageal lymph node after the second dose of nivolumab. a, d Computed tomography images showed the tracheoesophageal fistula at the proximal side of the placed stent. b, c A 3-cm segment of the membranous trachea had disappeared, and the stent was migrated.