<qa>  What is the Boost by external radiotherapy or brachytherapy accepted?- histologically proven carcinoma: Anal canal cancer locally advanced 4 cm and or N1 to N3 under irradiation on pelvic and inguinal lymph nodes with concurrent chemotherapy. The boost with brachytherapy are accepted Prostate cancer with pelvic lymph nodes and radiation or hormone therapy Cervical Cancer under a purely medical treatment involving irradiation on pelvic lymph nodes and primary tumor with concurrent chemotherapy without surgery. The Boost by external radiotherapy or brachytherapy are accepted. 