Superficial esophageal lesions detected by endoscopic ultrasound enhanced with submucosal edema

Figure 3 Endoscopic ultrasonography and tissue examination of the normal esophagus in a beagle dog. A: The three layers of a normal esophagus, as visualized by endoscopic ultrasonography (EUS); B: Tissue examination showed that the esophageal wall is composed of the mucosa (including squamous epithelium, lamina propria, and muscularis mucosa), submucosa, and muscularis propria and adventitia.