Is there a way to check for stomach cancer most accurately?

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Hello doctor! I went for a test and found that the PA 74-4 was abnormally high. I went for a gastroscopy and the doctor concluded that I only had gastritis. So tell me, is there any method to check for stomach cancer most accurately? I hope the doctor will reply me soon. Thank you.
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Hello! With the question: "Is there any method to check for stomach cancer most accurately?" Please advise as follows:
There are many methods to check for stomach cancer, from gastrointestinal endoscopy to other imaging tests. For his medical problem, the doctor needs to examine more, review the existing test results, maybe perform some more tests, to have a clear advice. You should register for an examination at the Gastroenterology Clinic, of one of the Vinmec Health System hospitals nationwide so that the doctor can advise you better!
Thank you for trusting and sending questions about Vinmec. Best regards!

Answered by Master, Doctor Mai Vien Phuong - Gastroenterologist - Department of Medical Examination & Internal Medicine - Vinmec Central Park International General Hospital