Specifically, external beam radiation therapy is the use of high-energy particles (photons or electrons) that are used to damage and kill cancer cells. With this type of radiation treatment, your pet is not receiving any radioactive substance and is safe to be around.
This treatment modality is capable of controlling, curing or palliating many types of cancer. Radiation therapy can be used alone or in combination with surgery and/or chemotherapy. It is used to treat local disease – tumors that have not spread to other locations within the body.
Radiation therapy has the potential to cure many localized tumors like soft tissue sarcomas such as; fibrosarcomas, hemangiopericytomas, peripheral nerve sheath tumors, invasive low grade (Grade I or 2) mast cell tumors, nasal lymphoma in cats.
It is also frequently used palliatively to reduce the size of a tumor or slow its growth in tumors such as brain tumors, anal sac tumors, lymphoma, and melanoma. Radiation therapy is also used to help minimize cancer induced pain caused by primary bone cancer (osteosarcoma) or cancer that has spread to bone.