Localized primary gastric amyloidosis: Three case reports

Figure 1 Endoscopic and histological data of patient 1. A: Esophagogastroduodenoscopy revealed a faint reddish flat elevated lesion, 15 × 16 mm in size, with multiple nodules on the surface in the great curvature of the antrum adjacent to the corpus. B: Narrow-band imaging (NBI) indicated a defined green area. C: Magnifying endoscopy with NBI showed expanded normal glands with changed polarity as well as dilated and tortuous vessels. D: Hematoxylin-eosin staining showed cystic dilated gastric glands. E: Massive and cord-like pink substances were deposited in the mesenchyme and inside the blood vessel wall at the bottom of the lamina propria mucosa, muscularis mucosae and superficial submucosal layer. F: Polarized light microscopy revealed apple-green birefringence in the lesions. Orange arrows indicate amyloid depositions.