Treatment of Radiation-induced Fibrosis in the Upper Aerodigestive Tract Cancer by a Combination of Pentoxifylline-tocopherol and Hyperbaric Oxygen

Inclusion Criteria: 1. Over 18 years and under 70 years old. 2. Patients who have received radiotherapy after being diagnosed with cancer of upper aerodigestive tract, and have skin toxicity grade II or higher. 3. Follow-up for at least a year after the radiation treatment is completed. 4. Absence of tumor at the time of recruitment. 5. Patients with the capacity to give informed consent Exclusion Criteria: 1. Allergy or hypersensitivity to Pentoxifylline or others xanthines, or to Tocopherol (vitamin E). 2. Patients taking oral anticoagulants (acenocoumarol, warfarin). 3. Known hemorrhagic/coagulation disorder. 4. Vitamin K deficiency due to any cause. 5. Use of estrogens oral contraceptives. 6. Serious bleeding or extensive retinal hemorrhage. 7. Ischaemic heart diseases, including recent Myocardial Infarction. 8. Serious cardiac arrhythmia. 9. Severe liver disease. 10. Severe renal failure (creatinine clearance \<30 mL/min). 11. Hypotension. 12. Patients with metal objects or electronic devices such as cardiac pacemakers, artificial heart valves or cochlear implants, or any other contraindication for MRI 13. Contraindication for Hyperbaric oxygen therapy. 14. Patients with mobility problems. 15. Female patients who are pregnant or lactating 16. Any other situation or condition that, in the opinion of the investigator, may interfere with optimal participation in the study.