title: Extraventricular cerebral anaplastic ependymomas.
abstract: BACKGROUND
  Anaplastic ependymomas are considered to be uncommon cerebral tumors by most authors. We have had the opportunity to study 34 cases of such lesions in 13 years.
  
  
  METHODS
  34 cases of anaplastic ependymoma operated in different hospitals of Maracaibo, Venezuela, during the period of 1983-1995 were analyzed. Cases of ependymoblastoma were excluded.
  
  
  RESULTS
  Adult patients made up most of the present series. All patients harbored supratentorial growths in locations distant from the ventricular system. The microscopic pattern was of limited value to establish prognosis, for there was no constant correlation between the histologic features and tumor relapse; only in sporadic cases in which high cell density and conspicuous mitotic activity were maximally expressed, did tumor relapse occur shortly after removal of the lesion.
  
  
  CONCLUSIONS
  This type of paradoxical behavior being the rule makes all attempts at predicting prognosis in these entities a disappointing task.
authors.affiliation: Hospital Universitario de Maracaibo, Servicio de Neurologia.
authors.forename: O M
authors.initials: OM
authors.lastname: Molina
authors.forename: J L
authors.initials: JL
authors.lastname: Colina
authors.forename: G D
authors.initials: GD
authors.lastname: Luzardo
authors.forename: O E
authors.initials: OE
authors.lastname: Mendez
authors.forename: D
authors.initials: D
authors.lastname: Cardozo
authors.forename: H S
authors.initials: HS
authors.lastname: Velasquez
authors.forename: J J
authors.initials: JJ
authors.lastname: Cardozo
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D001932:Brain Neoplasms / Q000188:drug therapy / Q000532:radiotherapy / Q000601:surgery*; D017024:Chemotherapy, Adjuvant; D002648:Child; D002675:Child, Preschool; D004806:Ependymoma / Q000188:drug therapy / Q000532:radiotherapy / Q000601:surgery*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D018714:Radiotherapy, Adjuvant; D012189:Retrospective Studies; D016896:Treatment Outcome