title: [Effectiveness of CT in the determination of the extent of infiltration of head and neck cancer].
abstract: For cancer therapy, especially radiation therapy, it is very important to determinate the invaded region. Since computed tomography (CT) is introduced into medical radiography, it has become well known that it has a highly diagnostic value not only for the intracranial lesions, but also for extracranial pathological processes. In this paper, 4 cases (pinealoma, rhabdomyosarcoma of the ear, nasopharynx tumor and Histiocytosis X of the orbit) are presented. In each case, pre-therapeutic and posttherapeutic CT images are shown. CT is also very useful during and after therapy in patients with malignancy of the head and neck.
mesh_terms: D001932:Brain Neoplasms / Q000000981:diagnostic imaging; D004428:Ear Neoplasms / Q000000981:diagnostic imaging; D006258:Head and Neck Neoplasms / Q000000981:diagnostic imaging* / Q000532:radiotherapy; D006646:Histiocytosis, Langerhans-Cell / Q000000981:diagnostic imaging; D006801:Humans; D009361:Neoplasm Invasiveness; D009918:Orbital Neoplasms / Q000000981:diagnostic imaging; D010871:Pinealoma / Q000000981:diagnostic imaging; D012208:Rhabdomyosarcoma / Q000000981:diagnostic imaging; D014057:Tomography, X-Ray Computed