Different types of stomach cancer include:
Adenocarcinomas of the stomach develop in the cells of the innermost lining of the stomach. Most stomach cancers are classified as adenocarcinomas of the stomach.
Lymphoma is a cancer of the immune system tissue that may start anywhere lymph tissues are found, including the stomach. Lymphomas in the stomach are rather rare and only account for about 4 percent of all stomach cancers.
Gastrointestinal stromal tumors, or GISTs, are a rare type of stomach cancer that forms in a special cell found in the lining of the stomach called interstitial cells of Cajal (ICCs). Under a microscope, GIST cells look similar to muscle or nerve cells. These tumors may develop throughout the digestive tract, but about 60 to 70 percent occur in the stomach.
Carcinoid tumors typically start in the hormone-producing cells of the stomach. These tumors usually do not spread to different organs and account for only about 3 percent of stomach cancer incidence.
Gastric carcinoid tumors come in three types:
Next topic: What are the stages of stomach cancer?