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| Adenoma or differentiated-type adenocarcinoma | Mixed-type or undifferentiated-type adenocarcinoma | |
| WOS-positive neoplasias (n = 51) | 49 (96.1 %) | 2 (3.9 %) |
| WOS-negative neoplasias (n = 79) | 64 (81.0 %) | 15 (19.0 %) |
WOS, white opaque substance; M-NBI, magnifying endoscopy with narrow band imaging.
