All patients were diagnosed with operation and histological examination. In 7 cases (11.3%) patients received biopsy only; subtotal resection was performed in 34 cases (54.8%) and gross total resection could be achieved in 21 cases (33.9%). Resection status as well as evidence for postoperative ischemia was evaluated by a post-operative MRI within 48 hours after surgery. The median performance status at the onset of RT was ECOG 1 (0–3). RT was administered using 3D-conformal or intensity modulated RT in all cases and was planned with post-operative MRI, a planning MRI one week before RT and contrast enhanced planning CT with a slice thickness of 2–3 mm. The clinical target volume (CTV) consisted of the sum of the resection cavity as well as all contrast enhancing areas plus a 2 cm margin and Fluid attenuated inversion recovery (FLAIR)- or T2-hyperintense areas, plus a 1 cm margin. A margin of 5 mm was added for the Planning Target Volume (PTV). Single doses ranged from 1.8 to 3.0 Gy, total doses from 40.05 to 60.0 Gy, mean 52Gy. All patients received 5 fractions per week.