Using ketamine in a patient with a near-occlusion tracheal tumor undergoing tracheal resection and reconstruction: A case report

Figure 1 Neck computed tomography and bronchoscopic view. A-C: Neck computed tomography showed a mass with soft-tissue density in the trachea pointed by orange arrows; D-F: In the bronchoscopic view, there was a mucosal neoplasm one cartilage ring below the glottis that occluded more than 90% of the lumen.