The literature shows, that the prevalence of functional dyspepsia is between 11 and 29.2 % in general population. The first goal of this study was to present a narrative review of the current findings of functional dyspepsia. The second goal was to find out the prevalence of functional dyspepsia in the II. Internal Clinic of Gastroenterology and Geriatry in Teaching Hospital of Olomouc (Czech Republic). According to the clinical experience, the prevalence of patients with functional dyspepsia seems to be not as high as literature shows. Normal gastroscopy findings are mandatory for the diagnosis of functional dyspepsia. That is why we examined 302 patients with indications for gastroscopy. According to the Rome IV criteria and normal gastroscopy findings, the diagnosis of functional dyspepsia was made only in 10 (3.31 %) patients. 108 patients have received repeated gastroscopy after 4 to 6 months period. But, none of them came with the diagnosis functional dyspepsia. Our results suggest, that the prevalence of functional dyspepsia after careful gastroscopic examination is lower than in the previous literature. This observation could change our view of functional dyspepsia and its diagnostics. Keywords: functional dyspepsia - gastroscopy - prevalence - Rome IV criteria.
Keywords: functional dyspepsia - gastroscopy - prevalence - Rome IV criteria.