Comparison of Small Bowel Lesions Using Capsule Endoscopy in Ulcerative Colitis and Crohn's Disease: A Single-Center Retrospective Analysis.

Background: Capsule endoscopy (CE) has allowed the characterization of small bowel lesions. However, small bowel lesions in ulcerative colitis (UC) have not been elucidated and no studies have compared between UC and Crohn's disease (CD).

Aim: The objective of this study was to investigate the small bowel lesions in UC, and to characterize UC lesions by comparison with CD.

Diagnostic performance of conventional endoscopy in the identification of submucosal invasion by early gastric cancer: the "non-extension sign" as a simple diagnostic marker.

Background And Aim: The ability to differentiate between mucosal (M) or microinvasive submucosal (SM1: depth of less than 500 µm) and invasive submucosal (SM2: depth of 500 µm or more) cancer is paramount when choosing the method of treatment for early gastric cancer (EGC). The "non-extension sign" relates to a localized increase in thickness and rigidity due to massive submucosal invasion by a cancer. The present study sought to assess the ability of conventional endoscopy (CE) to correctly identify SM2 cancer using only the non-extension sign.