“…Each patient individually underwent to a brief initial interview and variables such as age, family history of cancer, smoking and alcoholic habits, as well as how long they have being smoking and/or drinking, classification by KPS scale, which is a scale of functional performance used in the prognosis of cancer therapy 27 , and type of feeding 28,29 were collected. Data such as tumor location, histological type of tumor, tumor stage 30 , associated chemotherapy, radiation field and dose per session of RT were collected from the patient's chart for future correlations and characterization of sample.…”