[Cancers of the rhinopharynx in Tunisia. Epidemiological and anatomo-clinical aspects].

: Three hundred and ninety eight cancers of the nasopharynx were collected in five years (1969-1973). They occupy the first place in E.N.T. sites of cancer. The majority (390 cases) were carcinomas. Its frequency in youth is conspicuous in this study (63 cases--16%--under the age of 19). The age and year adjusted incidence per 100,000 in relation to the world population is 7.5 for men and 3.3 for women. Clinically, lymph node enlargement was apparent in 2/3 of the cases. The relative frequency of paraneoplastic syndromes in the young is noteworthy. With regard to aetiology, a study of the viral and immunogenetic hypothesis is in train.