The Updated Sydney System establishes the classification and grading of<unk>  which underlines the significance of combining topographical, morphological, and etiological information to help arrive at clinical diagnosis. In clinical practice,<unk>  staging is done using the OLGA (Operative Link on<unk>  Assessment) staging system for reporting gastric histology.<unk>  staging combines the atrophy score which is determined by biopsy and the atrophy topography which is determined by directed biopsy mapping.
Gastritis classification
Peptic ulcer classification
Dyspepsia classification
Crohn's disease classification
Inflammatory bowel disease classification
Ulcerative colitis classification
Appendicitis classification
Otitis externa classification