Fig. 1

Endoscopic images of the stomach and duodenum affected by MTX-LPD. a, Before the withdrawal of MTX treatment, there were multiple dish-like lesions in the stomach. b, Indigo carmine spraying revealed that the lesion rise was relatively steep, the surface structure was equivalent to that of the background mucosa, and ulceration with white coat was observed in the central part of the lesion. c, Narrow band imaging revealed meandering irregular microvessels without loops. d, There were dish-like lesions also in the duodenum