title: [Prevalence of bone neoplasms in adolescents and young adults].
abstract: BACKGROUND
  The objectives of this work were: (1) To determine the prevalence of bone neoplasms and pseudoneoplasms lesions in a group of adolescents (15 to 19 years), (2) To determine the more frequent bone neoplasms and pseudoneoplasms lesions in a group of young adults (29 to 39 years), (3) To determine if there are differences in the frequency of bone neoplasms and pseudoneoplasms lesions between the group of adolescents and the group of young adults and (4) To determine if there is any difference according to gender.
  
  
  METHODS
  We conducted a descriptive, cross-sectional study that consisted in the review of the Pathology Department files in the National Institute of Rehabilitation. We included all patients with a histopathologic diagnosis of bone neoplasms or pseudoneoplasms lesion from January 2000 to December 2006 within the age of presentation from 15 to 19 or 20 to 39 years.
  
  
  RESULTS
  The five more frequent bone neoplasms and pseudoneoplasms lesions in adolescents were osteochondroma, osteosarcoma, chondroblastoma, non-ossifying fibroma and aneurysmal bone cyst. In young adults the five more frequent were: giant cell neoplasm, osteosarcoma, osteochondroma, fibrous dysplasia and enchondroma.
authors.affiliation: Instituto Nacional de Rehabilitación, DF México. eestrada@inr.gob.mx
authors.forename: Eréndira
authors.initials: E
authors.lastname: Estrada-Villaseñor
authors.forename: Ernesto Andrés
authors.initials: EA
authors.lastname: Delgado Cedillo
authors.forename: Genaro
authors.initials: G
authors.lastname: Rico Martínez
mesh_terms: D000293:Adolescent; D000328:Adult; D001859:Bone Neoplasms / Q000453:epidemiology*; D003430:Cross-Sectional Studies; D005260:Female; D006801:Humans; D008297:Male; D015995:Prevalence; D055815:Young Adult