Abstract
Purpose
Stereotactic body radiotherapy (SBRT) has been firmly established as a treatment choice for patients with oligometastases, as it has demonstrated both safety and efficacy by consistently achieving high rates of local control. Moreover, it offers potential survival benefits for carefully selected patients in real-world clinical settings.
Methods
Between January 2008 and May 2020, a total of 149 patients (with 414 liver metastases) received treatment. The Active Breathing Coordinator device was used for 68 patients, while respiratory gating was used for 65 and abdominal compression was used for 16 patients. The most common histological finding was colorectal adenocarcinoma, with 37.6% of patients having three or more metastases, and 18% having two metastases. The prescribed dose ranged from 36 to 60 Gy, delivered in 3–5 fractions.
Results
Local control rates at 2 and 3 years were 76.1% and 61.2%, respectively, with no instances of local recurrence after 3 years. Factors negatively impacting local control included colorectal histology, lower prescribed dose, and the occurrence of new liver metastases. The median overall survival from SBRT was 32 months, with the presence of metastases outside the liver and the development of new liver metastases after SBRT affecting survival. The median disease-free survival was 10 months. No substantial differences in both local control and survival were observed between the respiratory motion control techniques employed. Treatment tolerance was excellent, with only one patient experiencing acute grade IV thrombocytopenia and two patients suffering from ≥ grade II chronic toxicity.
Conclusion
For radical management of single or multiple liver metastases, SBRT is an effective and well-tolerated treatment option. Regardless of the technology employed, experienced physicians can achieve similarly positive outcomes. However, additional studies are required to elucidate prognostic factors that can facilitate improved patient selection.
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We thank Daniel García de Quinto, for reviewing, revising, and editing this manuscript for English language grammar and syntax.
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O. Hernando-Requejo, X. Chen, M. López, E. Sánchez, J. García, P. García, R. Alonso, A. Montero, R. Ciervide, B. Álvarez, D. Zucca, M. García Aranda, J. Valero, P. Fernández Letón and C. Rubio declare that they have no competing interests.
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Hernando-Requejo, O., Chen, X., López, M. et al. Real-world effectiveness and safety of stereotactic body radiotherapy for liver metastases with different respiratory motion management techniques. Strahlenther Onkol 199, 1000–1010 (2023). https://doi.org/10.1007/s00066-023-02147-w
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DOI: https://doi.org/10.1007/s00066-023-02147-w