Abstract
Estimating survival is important for treatment personalization in patients with metastatic cancer. In this study, we aimed to develop a survival score for patients irradiated for bone metastases from colorectal cancer. Eleven factors were retrospectively analyzed in 25 patients, including age, gender, Eastern Cooperative Oncology Group performance score, tumor site, time between diagnosis of colorectal cancer and irradiation, visceral or other bone metastases, type and number of irradiated sites, upfront surgery and previous systemic treatment. On multivariate analysis, performance score (p=0.005) and previous systemic treatment (p=0.007) were significantly associated with survival and used for the score. One point (performance score 0-1 or no previous systemic treatment) or 0 points (performance score ≥2 or previous systemic treatment) were assigned resulting in 0, 1 or 2 points. Six-month survival rates of these groups were 0%, 64% and 100%, respectively. This new survival score can support physicians during personalization of treatment for patients with bone metastases from colorectal cancer.
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