Endoscopic treatment for early carcinoma in the gastrointestinal tract has in the meantime become evidence-based and has been incorporated into national and international guidelines

The Prague classification was presented by an international research group in 2006 (1) and has since been regarded as the standard for measuring the length

The NICE (NBI International Colorectal Endoscopic) Classification is based on narrow-band images of colon polyps. The classification uses staining, vascular patterns, and surface patterns to

Various systems are available for classifying esophageal varices. Unfortunately, they only overlap or coincide partly. The official terminology used by the German Society for Digestive