How is stomach cancer diagnosed?

Upper endoscopy . This is the best test to check your stomach for cancer. Endoscopy with narrow band imaging can help with early lesions under certain circumstances.
Usually endoscopy. Patients with suspicious symptoms are usually referred to a gastroenterologist, who performs an endoscopy. The patient takes sedation medicine, and then the doctor inserts a flexible camera into the stomach and looks for cancer. A piece of the tumor is removed which confirms the cancer diagnosis. Other tests can suggest stomach cancer too.