What is gastric cancer?

Gastric cancer is one of the most common malignant tumors. Gastric cancer is a malignant tumor originating from gastric mucosa epithelium, accounting for the third place of all malignant tumors, the first place of digestive tract malignant tumors and 95% of gastric malignant tumors. It can be seen that gastric cancer is a common disease that threatens human health. Gastric cancer can occur anywhere in the stomach, especially in the pyloric region. The lesion began in the gastric mucosa and gradually infiltrated into the deep layer, involving submucosa, muscularis, serosa and even adjacent organs. Or transfer the whole body through lymph and blood. Early symptoms are often not obvious, and symptoms such as upper abdominal pain, emaciation, loss of appetite, nausea, vomiting, diarrhea, hematemesis or melena gradually appear. The average life expectancy of untreated patients is about 13 months. With the rapid development of endoscopic technology and the emergence of CT, magnetic resonance imaging, immunoimaging and tumor marker detection technology, early detection, early diagnosis and early treatment of gastric cancer have become the research focus at home and abroad. At the same time, various comprehensive treatments with surgery as the core have been continuously developed, improved and perfected. The 5-year survival rate of gastric cancer is 65% ~ 70%, and the early gastric cancer 10 survival rate is over 95%.