title: [Essential bone cyst of the calcaneus in children. Report of three cases].
abstract: OBJECTIVE
  The purpose of this study was to analyze the properties of essential bone cyst of the calcaneus in childhood, as well as its evolution, and differences with regard to adults.
  
  
  METHODS
  The cases of children with a diagnosis of essential bone cyst of calcaneus in last sixteen years in the pediatric orthopedic unit of San Carlos Clinic have been reviewed. We evaluated the information regarding the clinical history and the radiological and histological date as well as the therapy result with esteroid intracavity therapy and curettage and bone grafting. The radiologic score was done following Södergard criteria and the posttreatment follow-up with Neer's score.
  
  
  RESULTS
  The mean age of the patients was 10.3 years. Two of the patients had recurrent heel pain for more than six months. Treatment consisted in intracavitary esteroid in two cases and curettage and bone grafting in all three cases, in two of the cases because of failure of esteroid therapy and in the other because of an atypical X-ray image. In all cases the histological stady identified the existence of a characteristic membrane conective tissue. The postsurgery follow-up a period of half four years has been satisfactory.
  
  
  CONCLUSIONS
  The essential bone cyst of the calcaneous is exceptional localization in children, frequently symptomatic and resistant to the esteroid intracavitaria contrary to what happens with the essential bone cyst of other localizations and with the essential bone cyst of the calcaneus in the adults. The recurrent heel pain and atipical X-ray image are surgery indications.
authors.affiliation: Unidad de Ortopedia Infantil, Hospital Clínico San Carlos, Madrid.
authors.forename: L M
authors.initials: LM
authors.lastname: Antón Rodrigálvarez
authors.forename: L
authors.initials: L
authors.lastname: Ortega Medina
authors.forename: M I
authors.initials: MI
authors.lastname: Cabadas González
authors.forename: L
authors.initials: L
authors.lastname: Aguilar Rodríguez
mesh_terms: D000293:Adolescent; D001845:Bone Cysts / Q000175:diagnosis* / Q000601:surgery; D002111:Calcaneus / Q000000981:diagnostic imaging* / Q000473:pathology* / Q000601:surgery; D002648:Child; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D012189:Retrospective Studies; D014057:Tomography, X-Ray Computed
vernacular_title: Quiste óseo esencial de calcáneo en el niño. Presentación de tres casos.