Abstract
About 15% of metastatic breast carcinoma patients are diagnosed with brain metastases. Historically, the majority are treated with palliative external whole-brain radiation with a median survival of 4 months. We examined stereotactic radiosurgery's effect on treatment outcome in such patients. Four hundred and fifty four consecutive patients with brain metastases were treated with stereotactic radiosurgery at Staten Island University Hospital, NY, between 1991 and 1999. The medical records of 60 women with histologically confirmed breast cancer were retrospectively reviewed. Forty-three patients (71%) received fractionated radiosurgery (4×600cGy) and form the core of this report. Sixty five percentage had been previously unsuccessfully treated by whole-brain radiation or had recurrence after craniotomy. Survival was calculated by the Kaplan–Meier method. The median age at diagnosis of brain metastases was 52 years, with median interval of 49 months following the diagnosis of tumor primary. Median survival from brain diagnosis reached 13.6 months. Overall median survival from radiosurgery treatment was 7.5 months. Fifteen patients with one or two brain lesions survived a median of 11.5 months. For the fractionated cohort of patients 1- and 2-year actuarial survival was 28.2% and 12.8%, respectively. Three patients are alive at 32, 34 and 64 months, respectively. We conclude that fractionated radiosurgery improves survival of patients with brain metastases from breast cancer, especially those with small lesions, good functional status and no other metastatic disease. These patients should be encouraged to consider radiosurgery, possibly before WBRT. Considering our 7.5 months overall survival including patients with multiple metastases, and patients with progressive brain metastases despite extensive standard therapy and often systemic disease, these results suggest that radiosurgery could benefit breast cancer patients with brain metastases and extend life.
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Lederman, G., Wronski, M. & Fine, M. Fractionated Radiosurgery for Brain Metastases in 43 Patients with Breast Carcinoma. Breast Cancer Res Treat 65, 145–154 (2001). https://doi.org/10.1023/A:1006490200335
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DOI: https://doi.org/10.1023/A:1006490200335