Fig. 1From: The role of single fraction Gamma Knife radiosurgery for intraventricular central neurocytomas and the utility of F-18 fluroethyltyrosine: two case reportsA Preoperative and 4 years after microsurgery MRI; B MRI and F-18 FET at the time of first GKS (upper image), and 3 years later (lower image); C MRI at the time of second GKS (left image) and 2 years later (right), with major shrinkage. Arrow points toward the recurrence which will be further treated by a second GKSBack to article page