PROstate CAncer Radiotherapy - Bowel Quality of Life (PROCAR-BQ)

Questionnaires (QLQ-C30 and PRT20 modules) will be held to patients at the beginning and at the end of RT (4 weeks) to evaluate the mean increase of lower GI symptoms and decrease in overall QoL after pelvic RT. For exploratory objectives, GLIM (Global Leadership Initiative on Malnutrition) criteria for malnutrition diagnosis, a 24h recall and DQI-I calculation will be assessed by the PI before the start of RT. CT sim \& dosimetry will be analyse by the PI before treatment to evaluation the body composition and the max and mean dose received by the bowel, the sigmoid and the rectum. A Polar watches will be loaned to the patient by the PI at the CT sim appointment to record patient's daily movement for two weeks (usual waiting time between CT and treatment) and recovered on the first day of treatment.