Fig. 1 Sporadic duodenal adenoma: different macroscopic presentations. a Type 0-Is with milk-white mucosa; b Type 0-IIa with reddish mucosa; c Type 0-IIa with milk-white mucosa.

Fig. 2 Representative images of convolutional neural network (CNN)1 identifying the differentiation status of EGCs for: a differentiated EGC predicted by CNN1 (to show results intuitively, confidence of differentiated EGC was outputted as “1 − raw prediction confidence”); b undifferentiated EGC predicted by CNN1 (confidence of undifferentiated EGC was outputted as raw prediction confidence).

Fig. 1 Two self-expanding metal stents inserted using the stent-in-stent technique to secure a hepaticogastrostomy.

“Art in endoscopy” is an initiative of four gastroenterologists in training that aims to display examples of the incidentally beautiful images that are sometimes encountered in regular endoscopic practice.​​​​​​​

Fig. 1 Endoscopic images of the gastric peroral endoscopic myotomy (G-POEM) procedure showing: a the pylorus prior to the procedure; b the longitudinal mucosal incision; c submucosal tunneling; d the axis of the tunnel being checked; e the end of the myotomy; f closure of the mucosal entry.

Fig. 3 Endoscopic and pathological images of the lesion in patient #5 showing: a a 0-IIa + IIc lesion 7mm in diameter in the third portion of the duodenum; b the lesion being removed by endoscopic mucosal resection with injection; c histopathological appearance of the lesion (stained with hematoxylin and eosin [H&E], × 4), which was an intramucosal carcinoma, with no residual tumor at the resection site.