Fig. 2.

(A) Endoscopic finding which was obtained at initial endoscopy at a local clinic. No definite ulcer was found. (B) Endoscopic finding just after performing forceps biopsy at a local clinic. Biopsy was performed at the center of the tumor surface. (C) Endoscopic finding at the tertiary referral center. An ulcer was shown on the tumor surface. (D) Endoscopic finding at endoscopic resection. The previously noted ulcer was healed after treating with proton pump inhibitors for 15 days. (E) Microscopic findings of resected specimen (H&E stain, ×40). The center of the specimen (arrow) shows a healed ulcer with submucosal fibrosis.