ESTRO 2025 - Abstract Book

S1639

Clinical – äediatric tumours

ESTRO 2025

Conclusion: Postoperative radiotherapy does not seem to confer an additional survival benefit among Grade 2 ependymoma compared to those who did not receive RT, even after stratification by extent of resection. Due to the limited number of subjects leading to wide confidence intervals caution must be used when inferring from this data.

Keywords: Grade 2 ependymoma, postoperative radiotherapy

References: Merchant, T. E., Jenkins, J. J., Burger, P. C., Sanford, R. A., Sherwood, S. H., Jones-Wallace, D., Heideman, R. L., Thompson, S. J., Helton, K. J., & Kun, L. E. (2002). Influence of tumor grade on time to progression after irradiation for localized ependymoma in children. International journal of radiation oncology, biology, physics, 53(1), 52–57. https://doi.org/10.1016/s0360-3016(01)02801-2 Guyotat, J., Signorelli, F., Desme, S., Frappaz, D., Madarassy, G., Montange, M. F., Jouvet, A., & Bret, P. (2002). Intracranial ependymomas in adult patients: analyses of prognostic factors. Journal of neuro-oncology, 60(3), 255– 268. https://doi.org/10.1023/a:1021136029072