Fig. 1
From: Benign esophageal schwannoma: a brief overview and our experience with this rare tumor
The examination image before the operation. a Endoscopy revealed an approximately 5.0 cm esophageal submucosal tumor, which was located 25 cm from the incisors. It occupied the majority of the esophageal lumen. b Computed tomography revealed a large isodense tumor of the esophageal wall in the upper mediastinal space (white arrow). c Endoscopic ultrasonography showed a large tumor (white arrow) of low echogenicity in the submucosa layer