Ключевые слова
age; cancer epidemiology; cancer statistics; cervical lymph node; cobalt therapy; diagnosis; geriatrics; jugular vein; lymph node metastasis; nasopharynx carcinoma; radiotherapy; adolescent; adult; aged; article; child; female; human; male; nasopharynx tumor; radiation dose; radioisotope therapy; Tunisia; Adolescent; Adult; Aged; Child; Female; Human; Male; Middle Age; Nasopharyngeal Neoplasms; Radioisotope Teletherapy; Radiotherapy Dosage; Tunisia