No statistically significant difference was found in prevalence of epilepsy between Group 1 and 2 at diagnosis, after neurosurgery, and during follow-up (p = 0.19). In Group 1 one out of 76 patients suffered epilepsy before surgery and 6 patients after neurosurgery until end of follow-up. In Group 2, none of the 28 patients suffered epilepsy. No significant association was found between the type of surgery and epilepsy (p = 0.47).