RTHP-15. INCIDENCE OF MASTOID EFFUSION IN PATIENTS RECEIVING PHOTON RADIATION THERAPY FOR GLIOBLASTOMA

摘要

PURPOSERadiation therapy (RT) induced mastoid effusion has been documented after-RT to the cranium, or head and neck. Grade 2/3 mastoid effusions (G2/3M) have been documented in nasopharyngeal cancers at rates of 20 – 30% and are correlated with the mean dose and volume of mastoid irradiated. However, mastoid effusions in patients with gliomas have not been well characterized. We hypothesized that different radiation volumes, tumor location, and the addition of radiosensitizing chemotherapy may impact the incidence and severity of mastoid effusions in patients irradiated for glioblastoma.