[Statistical survey on nasopharyngeal tumors--a study with reference to early diagnosis].
D000293:Adolescent; D000328:Adult; D000367:Age Factors; D005260:Female; D006801:Humans; D007564:Japan; D008297:Male; D008875:Middle Aged; D009303:Nasopharyngeal Neoplasms / Q000175:diagnosis* / Q000453:epidemiology* / Q000473:pathology / Q000628:therapy; D009362:Neoplasm Metastasis; D012737:Sex Factors