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Dear Mayo Clinic: I thought I had an ulcer, but my doctor ruled that out and wants to run tests. He said it could be functional dyspepsia. What causes this, and is it treatable? Answer: Functional ...

An overlap exists in the pathogenesis of FD and GP. The gut–brain axis (GBA) implicated in both disorders is influenced by visceral sensory abnormalities, gastric disaccommodation, gastric motor ...