Clinicopathological Evaluation and Prognostic Analysis in Breast Cancer Patients with Brain Metastasis

Background: Brain metastases are diagnosed in 5% 15% of patients with breast cancer. Clinical management of brain metastases appears to be crucial in improving the prognosis of patients with breast cancer that has metastasized to the brain. However, few studies have investigated whether treatment of metastatic brain tumors would lead to improved prognosis. Methods: A total of 41 breast cancer patients whose tumors metastasized to the brain and who were diagnosed and treated at our hospital were enrolled. This study was conducted to determine the characteristics of brain metastases and to identify the factors that may affect the treatment and prognosis of patients with brain metastases. Results: There were more patients with HER2 and triple negative subtypes than of the luminal subtype. The median time from the initiation of breast cancer treatment to the onset of brain metastasis was 31 months (range, 7 134 months). Significantly greater disease-specific survival (DSS) was observed in patients who had a performance status of 0 2 at the time of diagnosis of metastatic brain tumors than those with a performance status of 3 4 (p = 0.04). DSS was also significantly greater in patients who underwent surgery to remove brain metastases and in patients treated with systemic therapy (p = 0.0007 and 0.0001, respectively). Conclusions: It may be possible to improve the prognosis of patients with brain metastases if lesions are detected early enough when the patients’ performance status is still good. In order for these findings to be definitive, however, results of future prospective studies are eagerly awaited.