title: [Dysembrioplastic neuroepithelial tumors].
abstract: BACKGROUND
  The dysembryoplastic neuroepithelial tumours, first defined by Dumas-Duport in 1988, are characterized histologically by being found in the cerebral cortex and having a histological pattern of multinodular architecture, foci of cortical dysplasia and a specific glioneuronal element. The clinical condition is characterized by seizures with a long evolution. These seizures are usually simple or complex partial seizures, but occasionally become generalized tonic-clonic seizures. Radiological findings on CAT or MR are cystic images localized to the cortex, with a solid component and do not cause displacement. The surgical operation required involves excision of the lesion or lesionectomy. This may be done so as to include 1 cm of the periphery of the lesion. The evolution is excellent and in most cases the seizures disappear.
  
  
  METHODS
  We present 4 cases of a series of 470 patients with tumours of the nervous system, operated on over the past 10 years in the Hospital del Niño Jesús. The evolution of these 4 cases has been from 1 to 5 years. In all 4 cases lesionectomy was carried out, and the evolution has been excellent (grade I of Engel's classification).
  
  
  CONCLUSIONS
  1. Dysembryoplastic neuroepithelial tumours are solid and cystic, situated in the cerebral cortex, with foci of cortical dysplasia. They are characterized by having a specific glioneuronal element. 2. Clinically they are characterized by crises with a long evolution. 3. The surgical operation involves lesionectomy or excision of the lesion. The evolution is excellent.
authors.affiliation: Servicio de Neurocirugía, Hospital Infantil Niño Jesús, Madrid, España.
authors.forename: F
authors.initials: F
authors.lastname: Villarejo
authors.forename: C
authors.initials: C
authors.lastname: Alvarez-Sastre
authors.forename: J V
authors.initials: JV
authors.lastname: Martínez-Quiñones
authors.forename: P
authors.initials: P
authors.lastname: Colomar
authors.forename: A P
authors.initials: AP
authors.lastname: Martín-Gamero
authors.forename: C
authors.initials: C
authors.lastname: Pérez-Díaz
mesh_terms: D001932:Brain Neoplasms / Q000000981:diagnostic imaging / Q000473:pathology* / Q000601:surgery; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D007223:Infant; D008279:Magnetic Resonance Imaging; D008297:Male; D013724:Teratoma / Q000000981:diagnostic imaging / Q000473:pathology* / Q000601:surgery; D014057:Tomography, X-Ray Computed