how to test for a stomach tumor
Stomach Cancer During endoscopy, your doctor might remove a small piece of your stomach to check it for cancer cells. This is called a biopsy sample. The sample is then sent to a lab where it is looked at under a microscope to determine if it is cancerous. Difficulty Swallowing Dysphagia An endoscopy, also called a gastroscopy, is the most common test used to diagnose stomach cancer. An endoscope is a thin, flexible tube with a tiny light and video camera at the end, which sends pictures to a screen.