title: [Pediatric supratentorial oligodendrogliomas: Marseilles and Lyons experiences].
abstract: OBJECTIVE
  The goal of this study was to analyze the main aspects of oligodendrogliomas observed in children.
  
  
  METHODS
  The records of 35 children aged 15 years or younger (23 from Marseilles and 12 from Lyons) were reviewed. Clinical signs and symptoms, imaging findings (CT scan and pre- and post-operative MRI), extent of surgical resection, histology according to the WHO and Ste-Anne grading and survival were analysed. Considering all these factors, a statistical analyzis was undertaken in order to identify prognostic factors.
  
  
  CONCLUSIONS
  Oligodendrogliomas are rare tumors in children. The most important differential diagnosis to discuss is dysembryoplastic neuroepithelial tumor. Our study allowed us to distinguish several subgroups of patients with a different prognosis: thalamic tumors with a dismal prognosis versus hemispheric tumors. A group of cortical tumors we called "DNT-like" (hemispheric cortical tumor, isolated epilepsy, without neurological deficit and reased ICP, without edema and mass effect on MRI) with an excellent prognosis like the group with epilepsy. Histological grading (grade A/grade B and grade II/grade III) is also a prognostic factor.
authors.affiliation: Unité Fonctionnelle de Neurochirurgie Pédiatrique, Hôpital de La Timone, Marseille. gabriel.lena@ap-hm.fr
authors.forename: G
authors.initials: G
authors.lastname: Lena
authors.forename: C
authors.initials: C
authors.lastname: Mottolese
authors.forename: A
authors.initials: A
authors.lastname: Paz-Paredes
authors.forename: D
authors.initials: D
authors.lastname: Scavarda
authors.forename: N
authors.initials: N
authors.lastname: Girard
authors.forename: J
authors.initials: J
authors.lastname: Gouvernet
authors.forename: A
authors.initials: A
authors.lastname: Jouvet
authors.forename: D
authors.initials: D
authors.lastname: Figarella-Branger
mesh_terms: D000293:Adolescent; D002391:Catchment Area, Health; D002648:Child; D003937:Diagnosis, Differential; D005260:Female; D005602:France / Q000453:epidemiology; D007839:Functional Laterality; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D018302:Neoplasms, Neuroepithelial / Q000473:pathology; D009837:Oligodendroglioma / Q000175:diagnosis / Q000401:mortality / Q000601:surgery*; D011182:Postoperative Care; D015173:Supratentorial Neoplasms / Q000175:diagnosis / Q000401:mortality / Q000601:surgery*; D015996:Survival Rate; D013724:Teratoma / Q000473:pathology; D013788:Thalamus / Q000473:pathology / Q000601:surgery