Gastroduodenitis is related to gastric ulcer and dieulafoy lesion, and has symptoms including dyspepsia An important gene associated with Gastroduodenitis is ATP12A (ATPase H+/K+ Transporting Non-Gastric Alpha2 Subunit). Affiliated tissues include small intestine and liver, and related phenotypes are homeostasis/metabolism and endocrine/exocrine gland