Repeated stereotactic radiosurgery for recurrent brain metastases: An effective strategy to control intracranial oligometastatic disease

Abstract

Due to improvements in systemic therapies and longer survivals, cancer patients frequently present with re- current brain metastases (BM). The optimal therapeutic strategies for limited brain relapse remain undefined.

We analyzed tumor control and survival in patients treated with salvage focal radiotherapy in our center. Thirty- three patients with 112 BM received salvage stereotactic radiosurgery (SRS) or fractionated stereotactic radio- therapy (FSRT) for local or regional recurrences. Local progression was observed in 11 BM (9.8 %). After 1 year,

72 % of patients were free of distant brain failure, and the 2-year overall survival (OS) was 37.7 %. No increase in toxicity or neurologically related deaths were observed. The 2- and 3-year whole brain radiation therapy free survival (WFS) rates were 92.9 % and 77.4 %, respectively. Hence, focal radiotherapy is a feasible salvage of recurrent BM in selected group of patients with limited brain disease, achieving a maintained intracranial control and less neurological toxicity.