The benefits of screening might outweigh the risks in some people who are at increased risk for stomach cancer because they have certain risk factors (for example, certain potentially pre-cancerous stomach conditions or inherited conditions such as Lynch syndrome or familial adenomatous polyposis [FAP]). 
It might be helpful to screen people who have risk factors that give them a bigger chance of getting stomach cancer.  Some of these factors are potentially pre-cancerous stomach conditions or inherited conditions such as Lynch syndrome or familial adenomatous polyposis [FAP]). 