[Clinical study of 23 cases of early stomach tumor].
D000328:Adult; D000367:Age Factors; D000368:Aged; D005260:Female; D005773:Gastroscopy; D006801:Humans; D008297:Male; D008875:Middle Aged; D010781:Photography; D012737:Sex Factors; D013274:Stomach Neoplasms / Q000175:diagnosis* / Q000453:epidemiology; D013997:Time Factors