982 / 1138
10
SBRT for re-irradiation
•
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