Although stomach cancer usually finds its start within the interior layer of the five-layer stomach, it can develop anywhere in the organ and spread to other parts of the body by growing beyond the stomach wall, entering the bloodstream or reaching the lymphatic system.
Because adenocarcinomas make up the vast majority of stomach cancer cases, other types of stomach cancer are considered rare, including:
- Lymphoma: which affects a body’s immune system
- Gastrointestinal stromal tumors: often called GIST or gastric sarcomas
- Carcinoid tumors: which affect the hormone-producing cells of the stomach
Cancer risk factors include exposure to chemicals or other substances, as well as certain behaviors. They also include things people cannot control, like age and family history.
Stomach cancer risk factors
Most cancers have the same symptoms as other, less serious conditions. Still, it’s important to know the signs.
Stomach cancer symptoms