text: 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.
option_0: Gastritis classification
option_1: Peptic ulcer classification
option_2: Dyspepsia classification
option_3: Crohn's disease classification
option_4: Inflammatory bowel disease classification
option_5: Ulcerative colitis classification
option_6: Appendicitis classification
option_7: Otitis externa classification