Visc Med. 2017 Mar;33(1):54-61. doi: 10.1159/000454685. Epub 2017 Feb 03.
Treatment Options in Oligometastatic Disease: Stereotactic Body Radiation Therapy - Focus on Colorectal Cancer.
Visceral medicine
Aaron T Wild, Yoshiya Yamada
Affiliations
Affiliations
- Department of Radiation Oncology, Memorial Sloan Kettering Cancer Center, New York, NY, USA.
PMID: 28612018
PMCID: PMC5465794 DOI: 10.1159/000454685
Abstract
BACKGROUND: Improvements in systemic therapy for metastatic colorectal cancer (CRC) have markedly extended survival, rendering local control of metastases to critical organs of increasing importance, especially in the oligometastatic setting where the disease may not yet have acquired the ability to widely disseminate. While surgical resection remains the gold standard for oligometastases in many organs, stereotactic body radiation therapy (SBRT) presents a non-invasive alternative for achieving local control.
METHODS: A literature review was performed to identify and summarize the findings of key prospective and retrospective studies that have shaped the field of SBRT for oligometastases to the lung, liver, and spine with a focus on oligometastases from CRC in particular.
RESULTS: Modern dose-escalated SBRT regimens can achieve 1-year local control rates of 77-100%, 90-100%, and 81-95% for oligometastases involving the lung, liver, and spine, respectively. Rates of grade 3 or greater toxicity with contemporary SBRT techniques are consistently low at <10% in the lung, <5% in the liver, and <2%/8% for neurologic/non-neurologic toxicity in the spine, respectively.
CONCLUSION: SBRT appears safe and effective for treating oligometastases involving the lung, liver, and spine. Randomized trials comparing SBRT to surgical resection and other local therapeutic modalities for the treatment of CRC oligometastases bear consideration.
Keywords: Colorectal cancer; Gastrointestinal cancer; Oligometastasis; Stereotactic ablative body radiotherapy; Stereotactic body radiation therapy, SBRT
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