Abstract
Radiotherapy is a mainstay of efficient treatment of brain metastases from solid tumors. Immunotherapy has improved the survival of metastatic cancer patients across many tumor types. However, targeted therapy is a feasible alternative for patients unable to continue immunotherapy or with poor outcomes of immunotherapy. The combination of radiotherapy and targeted therapy for the treatment of brain metastases has a strong theoretical underpinning, but data on the efficacy and safety of this combination is still limited. A systematic search of PubMed, Embase, Web of Science and the Cochrane library database was conducted. Eleven studies were included for a total of 316 patients. Median OS was about 6.2-17.8 months from radiotherapy. Weighted survival and local control at 1 and 2 years were correlated (50.1 and 17.8%, 90.7 and 14.7% at 1 and 2 year, respectively). Radiotherapy given before or concurrently to targeted therapy provided the best effect on the outcome. For patients with brain metastases from cutaneous melanoma, the addition of concurrent targeted therapy to brain radiotherapy can increase survival and provide long-term control.
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