For patients with metastatic bladder cancer, radiotherapy is a good option to control symptoms and improve outcomes. Potential prognostic factors for survival including the radiation dose were investigated.
Ten factors were evaluated in 63 patients for association with survival after irradiation namely age, gender, performance status, initial T-category, initial N-category, metastases at initial diagnosis, number of metastases, metastatic sites, radiation dose and time from diagnosis of metastases to irradiation.
On univariate analysis, survival was negatively associated with Karnofsky performance score (KPS) ≤70 (p=0.033), initial N-category ≥1 (p=0.026) and radiation doses given as equivalent dose in 2-Gy fractions (EQD2) <20 Gy. Doses >30 Gy were slightly superior to 20-30 Gy. On multivariate analysis, EQD2 (p=0.015) maintained its significance; a trend was found for N-category (p=0.063) and KPS (p=0.073).
Predictors for survival after irradiation of metastases from bladder cancer were identified. Radiation doses ≥20 Gy should be used.
Anticancer research. 2016 Dec [Epub]
Lisa Manig, Lukas Käsmann, Stefan Janssen, Dirk Rades
Department of Radiation Oncology, University of Lübeck, Lübeck, Germany., Department of Radiation Oncology, University of Lübeck, Lübeck, Germany .