title: Accelerated para-articular osteochondroma formation within the knee: a case report.
abstract: BACKGROUND
  Intra-articular osteochondroma and acoustic neuroma are rare entities.
  
  
  METHODS
  We report the rare occurrence of a para-articular osteochondroma of the knee developing over short duration, 5 months, following minor injury.
  
  
  CONCLUSIONS
  Predisposition to heterotrophic ossification after previous neurosurgery and a second acoustic neuroma may have accelerated the growth of this benign tumour. The development of these two rare entities suggests they may be associated.
authors.affiliation: The Departments of Trauma and Orthopaedic Surgery, The University Hospital of North Staffordshire, Stoke-on-Trent, UK. mcarmont@hotmail.com
authors.forename: Michael R
authors.initials: MR
authors.lastname: Carmont
authors.forename: Sian
authors.initials: S
authors.lastname: Davies
authors.forename: Daniel
authors.initials: D
authors.lastname: Gey van Pittius
authors.forename: Robin
authors.initials: R
authors.lastname: Rees