Clinicopathological features and treatment of gastrointestinal schwannomas

Figure 3 Endoscopic ultrasonography images showing hypoechoic submucosal masses of gastrointestinal tract schwannomas originating from the muscularis propria. A: Tumor with uniform echoes from the muscularis propria of the esophagus; B: Tumor with uneven echoes from the muscularis propria of the gastric body; C: Tumor with uniform echoes from the muscularis propria of the sigmoid colon; D: Tumor with uniform echoes from the muscularis propria of the gastric body.