small intestinal stromal tumor
is not obvious. Suggestions: the incidence of GISTs is not high, about 1/1, ~ 2/1,. However, GISTs is the most common gastrointestinal mesenchymal tumor. GISTs is more common in middle-aged and elderly people, but rare before 4 years old. The median age of onset is 5-65 years old. According to statistics, about 6%~7% occur in stomach, 2%~3% in small intestine, and less than 1% in esophagus, colon and rectum. There is no difference between men and women, and GISTs may also occur in omentum and mesentery.