Fig. 1From: A case of adenoid cystic carcinoma of the esophagusEndoscopic findings. a Protruding lesion located in the middle of the esophagus. b The tumor region was faintly stained with iodine. c Narrow-band imaging of the lesion suggested irregularity of intraepithelial papillary capillary loops. d Endoscopic ultrasonography detected a mixed echogenic lesion in the submucosal layerBack to article page