The Korean Gastric Cancer Association (KGCA) first developed the Korean version of gastric cancer treatment guideline in 2004. With tremendous efforts for the standardization of gastric cancer treatment, the KGCA developed the first English edition of gastric cancer treatment guidelines in 2018, which integrated multidisciplinary disciplines, including the Korean Society of Medical Oncology (KSMO), the Korean Society of Gastroenterology (KSG), the Korean Society for Radiation Oncology (KOSRO), and the Korean Society of Pathologists (KSP), along with the participation of experts in the methodology of guidelines development (Nationa Evidence-based Healthcare Collaborating Group).

This guideline will be revised every 3 to 5 years when there is new solid evidence that can change the treatment principles of gastric cancer.