1 Department of Neurosurgery, National Institute Mongi Ben Hamida of Neurology, Faculty of Medicine of Tunis, University of Tunis El Manar, Tunisia. Electronic address: khalil.ghedira@fmt.utm.tn.
2 Department of Neurosurgery, National Institute Mongi Ben Hamida of Neurology, Faculty of Medicine of Tunis, University of Tunis El Manar, Tunisia.
3 Department of Radiotherapy, Abderrahmane Mami Hospital, Faculty of Medicine of Tunis, University of Tunis El Manar, Tunisia.