[Five-years synchronized radiotherapy in treatment of carcinoma of the head and neck: clinical results, 1970--1974 (author's transl)].

Increased tumor radiosensitivity can be achieved by the technique of synchronisation, although as yet this relationship has only been partial. Our clinical experiences from 1970-1974 with this technique lead to the following considerations: 1. Synchronized radiotherapy (Telecobalt) is administered twice weekly, independent of adjunctive medications (such as fluoro-uracil, vincristin or bleomycin). 2. Synchronized radiotherapy does not change previous indications for operative intervention. 3. The described technique permits successful treatment of advanced tumors as well as postoperative tumor recurrences of recurrences in previously-irradiated tisssues. 4. The radiosensitivity of poorly oxygenated tumor tissues may be increased. 5. Radiation dosage must not be reduced. 6. Distant tumor metastases can also be treated with additional chemotherapy (as synchronized chemotherapy).