Protective troquelada gauze of radiodermatitis after sessions of breast radiotherapy, characterized by consisting of a gauze (1) able to cover at least half of the female torso after sessions of breast radiotherapy, to which a hole has been opened (2) circulate subsequently die-cut (3), through which the left or right arm passes, according to the breast that is subjected to radiation, whereby said breast is protected from external agents and friction. (Machine-translation by Google Translate, not legally binding)1. Gasa troquelada protectora de la radiodermitis tras sesiones de radioterapia de mamas, caracterizada por consistir en una gasa (1) capaz de cubrir al menos la mitad del torso femenino tras sesiones de radioterapia de mamas, a la que se le ha abierto un orificio (2) circular posteriormente troquelado (3), por donde pasa el brazo izquierdo o el derecho, según la mama que se someta a la radiación, con lo que dicha mama queda protegida de agentes externos y de rozamientos.