title: Computed tomography-guided percutaneous trephine removal of the nidus in osteoid osteoma patients: experience of a single center in Brazil.
abstract: OBJECTIVE
  To report the results of computed tomography (CT)-guided percutaneous resection of the nidus in 18 cases of osteoid osteoma.
  
  
  METHODS
  The medical records of 18 cases of osteoid osteoma in children, adolescents and young adults, who underwent CT-guided removal of the nidus between November, 2004 and March, 2009 were reviewed retrospectively for demographic data, lesion site, clinical outcome and complications after procedure.
  
  
  RESULTS
  Clinical follow-up was available for all cases at a median of 29 months (range 6-60 months). No persistence of pre-procedural pain was noted on 17 patients. Only one patient experienced recurrence of symptoms 12 months after percutaneous resection, and was successfully retreated by the same technique, resulting in a secondary success rate of 18/18 (100%).
  
  
  CONCLUSIONS
  CT-guided removal or destruction of the nidus is a safe and effective alternative to surgical resection of the osteoid osteoma nidus.
authors.affiliation: MD, Orthopedic Surgeon, Instituto de Oncologia Pediátrica - GRAACC/Unifesp, São Paulo, SP, Brazil.
authors.forename: Marcelo
authors.initials: M
authors.lastname: Petrilli
authors.affiliation: MD, Medical Manager of Clinical Research Department, Instituto de Oncologia Pediátrica - GRAACC/Unifesp, São Paulo, SP, Brazil.
authors.forename: Andreza Almeida
authors.initials: AA
authors.lastname: Senerchia
authors.affiliation: PhD, Medical Director, Instituto de Oncologia Pediátrica - GRAACC/Unifesp, São Paulo, SP, Brazil.
authors.forename: Antonio Sergio
authors.initials: AS
authors.lastname: Petrilli
authors.affiliation: PhD, Head of Radiology Department, Instituto de Oncologia Pediátrica - GRAACC/Unifesp, São Paulo, SP, Brazil.
authors.forename: Henrique Manoel
authors.initials: HM
authors.lastname: Lederman
authors.affiliation: PhD, Head of Orthopedic Department, Instituto de Oncologia Pediátrica - GRAACC/Unifesp, São Paulo, SP, Brazil.
authors.forename: Reynaldo Jesus
authors.initials: RJ
authors.lastname: Garcia Filho
keywords: Benign tumor; CT-guided; Image-guided; Nidus; Osteoma osteoid