Esophageal carcinoma originating in the surface epithelium with immunohistochemically proven esophageal gland duct differentiation: A case report

Figure 1 Endoscopic appearance. A: White-light conventional endoscopy showed a submucosal tumor-like lesion. There were two reddish depressed areas on the surface of the tumor; B: The lesion appeared as brownish areas on NBI; C: Magnification endoscopy with NBI revealed irregular loop-shaped microvessels coexisting with irregularly branched thick non-looped vessels in depressed areas, where Lugol’s iodine (D) showed negative staining.