Ketogenic Diet Compliance in Patients Undergoing Radiotherapy for Pelvic Cancers

"In the group of intervention is prescribed a ketogenic diet plan characterized by the following composition: carbohydrates \< 30g/day, 1.2g-1.5g protein/kg/day and lipids \> 65%.~This diet will be followed during the period of treatment with chemo-radiotherapy (5 weeks)"

The control group (SD) will follow the Mediterranean diet pattern based on ESPEN guidelines (carbohydrates 45-55%, protein 15-20% and lipids 30-35%).