[Endoscopic observation of gastric diseases with special reference to biopsy].
D001706:Biopsy; D020699:Gastroscopes; D005773:Gastroscopy; D006801:Humans; D008722:Methods; D013272:Stomach Diseases / Q000175:diagnosis* / Q000473:pathology; D013274:Stomach Neoplasms / Q000175:diagnosis* / Q000473:pathology