[Evaluation of diagnostic difficulty cases by gastroscopy].
D000328:Adult; D000368:Aged; D003937:Diagnosis, Differential; D005260:Female; D005773:Gastroscopy; D006801:Humans; D008297:Male; D008875:Middle Aged; D013272:Stomach Diseases / Q000175:diagnosis*; D013274:Stomach Neoplasms / Q000175:diagnosis