title: [Endoscopic study of the Eustachian tube of nasopharyngeal carcinoma].
mesh_terms: D000328:Adult; D000368:Aged; D004724:Endoscopy / Q000379:methods; D005064:Eustachian Tube / Q000473:pathology*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009303:Nasopharyngeal Neoplasms / Q000473:pathology*