Fig. 3

As shown in A, the mucosa at the SCJ was also partially congested and edematous. After the gastroscope passed through the cardia (B), it was evident that the lesion involved the fundus and greater curvature of the stomach. The diseased mucosa was congested, edematous, and bulged, resembling snakeskin. When we turned the gastroscope lens to observe the lesion closely (C), we observed the erosion and spontaneous bleeding. Endoscopic ultrasound showed thickened stomach wall, mucosal level disappearance, uneven echo of the lesion, manifested as low echo, and unclear boundary. The thickness of the thick part was about 2.6 cm, and the lesion invaded through the serosa, but we did not observe enlarged lymph nodes. The letters A–C in this figure correspond to the numbers 1–3 in F, and the letters D–G are all seen by ultrasound gastroscopy at the lesion, corresponding to the number 4 in F