“How common is external beam radiotherapy?”

Radiation therapy can be used alone or combined with chemotherapy or surgery or combined all three treatment for cure or use for palliate symptoms such as pain or relieve obstruction or stop bleeding. Radiation therapy can be used to treat skin cancer, head and neck cancer, brain tumor, breast, lung, stomach, colon, prostate, bladder, uterus, cervix, anal cancer, and lymphoma.

External beam radiotherapy is the most common form of clinical radiotherapy

Roger Macklis