What is Gastric Cancer & Treatment - First we need it to confirm it is a cancer we take samples from the stomach with a endoscopy which is a simple camera which we pass from the mouth in to the stomach and we take the samples. That take about two minutes It's a very safe processor and there is no side effects after we confirm that there is cancer next thing is we stage the diseases, staging means in that's area itself has it spread outside that area. If unfortunately spread outside the stomach then treatment options is limited.