Stomach Disease, also known as gastropathy, is related to gastritis and atrophic gastritis, and has symptoms including abdominal pain, constipation and diarrhea. An important gene associated with Stomach Disease is DDX21 (DExD-Box Helicase 21), and among its related pathways/superpathways are Cell differentiation - expanded index and miRNAs involved in DNA damage response. The drugs Clarithromycin and Dexlansoprazole have been mentioned in the context of this disorder. Affiliated tissues include small intestine and liver.