[Limitation in endoscopic diagnosis of the early stage of stomach cancer].
D000328:Adult; D001706:Biopsy; D002299:Cardia / Q000473:pathology; D003581:Cytodiagnosis; D004945:Esophagoscopy; D004947:Esophagus / Q000473:pathology; D005260:Female; D005773:Gastroscopy; D006801:Humans; D011127:Polyps / Q000175:diagnosis; D013274:Stomach Neoplasms / Q000175:diagnosis*; D013276:Stomach Ulcer / Q000175:diagnosis; D013997:Time Factors