Upper gastrointestinal endoscopy: evolving classification tools

Gastrointestinal (GI) endoscopy is a fundamental tool for diagnosing and managing digestive diseases. Standardized classification systems have enhanced the consistency, accuracy, and clinical decision-making in endoscopic evaluation. This review explores key classification systems, their applications, and challenges in their implementation (1). A comprehensive literature search was conducted using PubMed, Scopus, Web of Science, Embase, Cochrane Library, Google Scholar, Medline, and ClinicalTrials.gov. Relevant classification systems for upper GI endoscopy were categorized based on anatomical regions and adverse event reporting. Artificial intelligence (AI)-assisted tools were used to refine descriptions of classification criteria, and a structured figure was developed to visually represent these classifications. Major classification systems reviewed include the Los Angeles Classification (2) for reflux esophagitis, Prague Classification (3) for Barrett's esophagus, and the Forrest Classification (4) for peptic ulcer disease. The AGREE Classification (5) was highlighted for its role in adverse event reporting. Advances in high-definition imaging and narrow-band imaging (NBI) (6) have refined these classifications, improving diagnostic precision. However, practical challenges remain, including the complexity of these systems and the need for continuous education among endoscopists (7). Endoscopic classification systems play a crucial role in standardizing the assessment of GI diseases, improving diagnostic accuracy, treatment decisions, and communication among clinicians. As these classifications evolve, their continued refinement and integration into clinical practice will enhance their utility, ensuring consistency in endoscopic evaluations and better patient outcomes.