Esophageal superficial adenosquamous carcinoma resected by endoscopic submucosal dissection: A rare case report

Figure 1 Esophagogastroduodenoscopy revealing a superficial lesion in the distal esophagus. A: Upon white light endoscopy, a flat lesion of approximately 2.5 cm × 1.5 cm in size was found, with the central part uneven and slightly elevated. The lesion presented slight reddening of the mucosa with a coarse surface; B: Narrow-band imaging showed a well-demarcated brownish area of background coloration; C and D: Iodine staining (1%) visualized the lesion as an unstained area with a comparatively clear boundary, and pink color sign could be seen.