title: [Bone tumor frequency in adults and elderly].
abstract: BACKGROUND
  We consider of great importance knowing the types of bone tumors and tumor-like lesions in adults and the elderly, which are increasing in proportion in our country.
  
  
  OBJECTIVE
  (1) To analyze the frequency of bone tumors and tumor-like lesions in adults and elderly; (2) to determine any difference between these two groups; (3) and to analyze the most frequent sites of involvement.
  
  
  METHODS
  We conducted a cross-sectional descriptive study that consisted in a retrolective review of all cases classified as a bone tumor or a tumorlike condition from year 2000-2006. We included all patients that presented with a bone tumor or tumor-like condition above 40 years-old.
  
  
  RESULTS
  The most frequent diagnoses in patients between 40 and 60 years-old were plasmocytoma/myeloma (19.4%); giant cell tumor (14.1%) and metastases (12.3%). In patients older than 60 years, prevalence of bone tumor and tumor-like lesion was respectively: metastases (37.2%); plasmocytoma/myeloma (11.8%) and malignant fibrous histiocytoma (6.7%). Several differences were observed between these two groups.
authors.affiliation: Depto. de Anatomía Patológica, Instituto Nacional de Rehabilitación, Calzada México Xochimilco Núm. 289, Col. Arenal de Guadalupe, Delegación Tlalpan, C. P. 14389, DF México. eestrada@inr.gob.mx
authors.forename: Eréndira G
authors.initials: EG
authors.lastname: Estrada-Villaseñor
authors.forename: José F
authors.initials: JF
authors.lastname: Flores-Carmona
authors.forename: Ernesto Andrés
authors.initials: EA
authors.lastname: Delgado-Cedillo
authors.forename: Genaro
authors.initials: G
authors.lastname: Rico-Martínez
mesh_terms: D000328:Adult; D000367:Age Factors; D000368:Aged; D001859:Bone Neoplasms / Q000453:epidemiology*; D003430:Cross-Sectional Studies; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged