SBRT2015

• A 50 year old female with a history of papillary thyroid cancer • In 1979 was treated with Iodine-131 • followed by external beam radiotherapy consisting of 40Gy Photon radiotherapy and 20Gy Electron radiotherapy • Details of radiotherapy techniques and doses to organs-at-risk are unknown • Developed breast cancer in 2002 and bone metastases in 2007 • In 2008, a palliative radiotherapy of thoracic vertebras 2-4 was performed with a total dose of 40Gy − 20 Gy were delivered using posterior wedged fields − 20 Gy were delivered using AP/PA fields with sparing of the spinal cord Case example: re-irradiation for verterbral metastasis Re-irradiation for spinal metastases

SBRT for re-irradiation

10