Fig. 1From: A modified endoscopic submucosal dissection for a superficial hypopharyngeal cancer: a case report and technical discussionEndoscopic features of superficial pharyngeal cancer in the right pyriform sinus. a, Superficial pharyngeal cancer in the right pyriform sinus. b, Narrow-band imaging (NBI) showing the pharynx with a well-demarcated brownish area; c. Magnified NBI showing an intra-papillary capillary loop type B1 pattern; d, The tumour outline was delineated by iodine staining. e and f. Cervical computed tomographic (CT) view. No lymph node metastasis was identifiedBack to article page