▶ The patient is female, 66 years old(From Shenzhen University General Hospital);

▶ Findings: An umbilicus-like protrusion about 0.8 cm in size was seen on the back wall of esophageal, about 30 cm away from the incisors; the surface of mucosa was congested and edematous; the boundary was clear after NBI observation, the remaining parts of esophageal mucosa was smooth; the vascular network was clear, and no ulcers, erosions, Polyps and varicose veins etc. The cardia was normal. Fundic mucosa was normal. Gastric mucus is clear, and the amount is medium. There was no congestion and edema in gastric body mucosa, and the folds were arranged regularly. The gastric angle is arc-shaped and symmetrical, and the mucosa is smooth. The gastric antrum mucosa is not smooth, red and white, mainly red, and multiple erythema can be seen. The pylorus is round and well opened and closed. There was no deformation, congestion, edema, and ulcer in the duodenal lumen, and a hemispherical protrusion about 0.4 cm in size was seen in the descending segment. The surface mucosa was smooth and normal in color, and the circular folds of mucosa and the mucosa were normal.

▶ Findings of mini-probe endoscopic ultrasonography: The lesion originates from the mucosa, invades the submucosa and part of the muscularis propria, showing a low mixed echo mass shadow. 2 biopsies were taken.

▶ Diagnostics:

Esophageal bulge considers tumor

chronic non-atrophic gastritis

Consider submucosal cyst in descending part of duodenum protuberance