Most of the time, you begin diagnosing stomach cancer by seeing your family doctor. Sometimes people are diagnosed with stomach cancer after being admitted to hospital with a symptom that is making them feel sick. Sometimes blood tests can also be used to detect stomach cancer. A complete count on a CBC is ordered to determine whether there is anemia, as a result of internal bleeding.
If there is blood in the stools, a fecal occult blood test is usually ordered. Different imaging tests are also used for stomach cancer like upper gastrointestinal series, endoscopic ultrasound, computed tomography or CT/CAT scan, magnetic resonance MRI scan, positron emission tomography or PET scan and a chest x-ray. Each of these tests uses different methods to detect possible cancer growth in the stomach. Laparoscopy is also sometimes used to determine the size of the tumor.