Atrophic Gastritis: Intestinal Metaplasia, ICD-10 K29.4 & OLGA Staging
Clinical Definition Atrophic Gastritis is a chronic histopathological entity characterized by the loss of native gastric glandular structures and their replacement by fibrosis or metaplastic epithelium (Intestinal Metaplasia). It represents a critical stage in Correa’s Cascade of gastric carcinogenesis. Etiologically, it is classified into Environmental Metaplastic Atrophic Gastritis (EMAG), primarily driven by Helicobacter pylori infection…