Fig. 3.

Endoscopic examination performed before endoscopic submucosal dissection confirmed the presence of (a) a well-circumscribed, 10-mm, reddish, smooth, elevated lesion in the posterior wall of the fornix. The tumor was soft, and there was no evidence of expanding appearance. There was no clear line of demarcation. Dilated vessels exhibiting a branching architecture were observed on the surface. Atrophic change was not seen in the surrounding mucosa. b Magnifying endoscopy with narrow band imaging revealed a regular MV pattern and a regular MS pattern without a demarcation line. c The resected tissue measured 28 × 22 mm, and the flat elevated lesion measured 11 × 10 mm