[Early esophageal cancer].
D000328:Adult; D000367:Age Factors; D000368:Aged; D001706:Biopsy; D003581:Cytodiagnosis; D004938:Esophageal Neoplasms / Q000175:diagnosis* / Q000473:pathology; D004945:Esophagoscopy; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009367:Neoplasm Staging; D011379:Prognosis; D012737:Sex Factors