1250 / 1578
/
• 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
o
20 Gy were delivered using posterior wedged fields
o
20 Gy were delivered using AP/PA fields with sparing of the spinal
cord
Case example: re-irradiation for verterbral
metastasis
ESTRO SBRT 2017 - Matthias Guckenberger
3
07.09.17
/
20 Gy wedged fields
20 Gy AP/PA with SC sparing
• In 2010, the patient suffered
from recurrent pain in these
vertebras and CT imaging
showed progressive osteolytic
metastases
Ø
Re-irradiation was offered
Case example: re-irradiation for verterbral
metastasis
ESTRO SBRT 2017 - Matthias Guckenberger
4
07.09.17