[Magnifying endoscopic observation on gastric peptic ulcer and gastric cancer].
D000328:Adult; D000368:Aged; D005260:Female; D005773:Gastroscopy; D006801:Humans; D008297:Male; D008875:Middle Aged; D013270:Stomach / Q000473:pathology*; D013274:Stomach Neoplasms / Q000473:pathology*; D013276:Stomach Ulcer / Q000145:classification / Q000473:pathology*