Total removal of a large esophageal schwannoma by submucosal tunneling endoscopic resection: A case report and review of literature

Figure 1 Plain and contrast-enhanced chest computed tomography. A: Coronal view of chest computed tomography (CT) showed that the tumor in the middle and upper esophagus had clear boundaries and homogeneous density; B: Sagittal view of the CT scan revealed the mass was located in the posterior mediastinum, and the upper and lower diameters were larger than the anterior and posterior diameters; C and D: Axial view of CT demonstrated the tumor presented homogeneous enhancement.