Like all cancers, the disease is the result of unrestrained multiplication of cells.
Normal cells divide in a planned way, creating more cells only when needed.
Cancer cells may grow into nearby healthy tissue, or they may break away from the tumor and travel through the blood stream or lymphatic system to other parts of the body. Stomach ulcers caused by the H. pylori bacterium increase your chances of developing this form of cancer. They could signal cancer, or any number of other digestive problems. Unexplained weight loss Care To find out what stage the cancer has reached, your doctor will measure the size of the tumor and order blood tests to see if the cancer has spread. He'll probably need to take a tissue sample from your stomach, and may need x-rays and other types of imaging.