If a patient has a number of symptoms or risk factors, the following tests can help to diagnose stomach cancer in addition to routine physical examinations.
In a fecal occult blood test,a small portion of the patient's stool is tested with a chemical. The presence of hidden, or occult, blood in the stool may indicate malignant growth, but hidden blood in the stool can also be found when cancer is not occurring.
During a barium swallow, the patient drinks a liquid containing barium, which coats the esophagus and stomach, making any abnormal growth visible in x-rays. Very often a "double contrast" technique is used, whereby air is pumped into the stomach through a swallowed tube after the patient has drank the barium-containing liquid. The air makes the barium coating thinner and better able to illustrate smaller areas of unusual growth. This procedure is known as a barium upper GI radiograph.
In an endoscopy, a long thin tube is extended down the patient's throat, through the esophagus and to the stomach. The physician uses the tube, or endoscope, to see closer if there is any abnormal growth. If so, a biopsy can be performed in which some tissue can be removed and examined under a microscope by a pathologist. Biopsies can accurately determine whether cancerous growths are occurring.
An
endoscopic ultrasound puts ultrasound technology at the tip of an endoscope. An ultrasound utilizes inaudible sound waves, which bounce off internal organs and create a picture of the internal body.