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Systemic therapy is the main treatment for patients with metastatic cancers. Oligo-progressionhas become a recognized entity for metastatic cancer and it is thought that a subset of cancer cells may develop heterogeneity and resistant clones while receiving systemic therapy. This results in overall tumor response but progression in metastatic sites. Current standard is to change systemic therapies. With advancing technologies, stereotactic body radiation therapy is being used to deliver high doses of focused radiation to the disease site, while minimizing risk of injury to the surrounding organs. SBRT is increasingly being used in patients presenting oligo-metastatic disease, and is recognized as having a potential for cure. This study will investigate the use of SBRT for cancer patients with oligo-progression. Patients will be seen before and at the end of treatment and will be followed at 4 month intervals for up to 2 years.
During the visits participants will complete quality of life questionnaires and will have standard of care imaging.
Patients will also be required to provide blood at baseline, during treatment, and at various follow up time points for analysis of ctDNA
Stereotactic Body Radiotherapy
Princess Margaret Cancer Centre
University Health Network, Toronto
Published on BioPortfolio: 2019-10-16T10:39:33-0400
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Radiotherapy given to augment some other form of treatment such as surgery or chemotherapy. Adjuvant radiotherapy is commonly used in the therapy of cancer and can be administered before or after the primary treatment.
A radiological stereotactic technique developed for cutting or destroying tissue by high doses of radiation in place of surgical incisions. It was originally developed for neurosurgery on structures in the brain and its use gradually spread to radiation surgery on extracranial structures as well. The usual rigid needles or probes of stereotactic surgery are replaced with beams of ionizing radiation directed toward a target so as to achieve local tissue destruction.
The total amount of radiation absorbed by tissues as a result of radiotherapy.
A collective term for interstitial, intracavity, and surface radiotherapy. It uses small sealed or partly-sealed sources that may be placed on or near the body surface or within a natural body cavity or implanted directly into the tissues.
Materials used as reference points on or implanted in the body to position patients for radiotherapy.
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