THE USE OF GAMMA-KNIFE SURGERY IN PALLIATIVE CARE OF RELAPSING EPENDYMOMAS WITH DURABLE QUALITY OF LIFE - Giraud, G.; Holm, S.; Gustavsson, B.; Lundgren, Johan; Dodoo, E. (14th International Symposium on Pediatric Neuro-Oncology, Vienna, Austria, 2010-06-20 - 2010-06-23, 2010)