Can stereotactic body radiation therapy be used to treat colorectal liver metastases effectively?
Stereotactic body radiation therapy (SBRT) is a type of radiation that delivers high doses to specific tumors while sparing healthy tissue. For colorectal liver metastases, SBRT can be delivered safely with excellent long-term local control and overall survival 4. It is often used for patients with a small number of tumors (oligometastatic disease) or those who are not candidates for surgical removal 5.
What the research says
Studies show that SBRT provides strong results for colorectal liver metastases. One analysis found that patients treated with SBRT receiving at least 70 Gy of biologically effective dose had a 74.5% rate of remaining free from local progression at one year 2. This approach allows for large radiation doses in just a few sessions, which helps control tumor growth effectively 4.
The treatment is particularly useful for selected patients with oligometastatic colorectal cancer, either alongside surgery or after other treatments fail 5. Research indicates that SBRT can be delivered safely in one to five fractions for lesions away from critical organs, with five fractions preferred for others 4. This flexibility helps tailor the treatment to the specific location and number of tumors in the liver.
What to ask your doctor
- Is my liver tumor pattern considered oligometastatic, making me a candidate for SBRT?
- How many radiation sessions would I need for my specific tumor location?
- What are the risks to nearby organs like the stomach or intestines with my tumor size?
- Can SBRT be combined with surgery or other local therapies for my case?
- What is the expected rate of local control for my specific tumor burden?
This question is drawn from common patient questions about this topic and answered using cited medical research. We do not provide individualized advice.