title: Ollier disease with anaplastic astrocytoma: A review of the literature and a unique case.
abstract: BACKGROUND
  Ollier disease is a rare, nonfamilial disorder that primary affects the long bones and cartilage of joints with multiple enchondromas. It is associated with a higher risk of central nervous system (CNS) malignancies; although the incidence is unknown.
  
  
  METHODS
  Here, we present the case of a 55-year-old woman who developed an anaplastic astrocytoma with a known diagnosis of Ollier disease with a survival time of over 3 years.
  
  
  CONCLUSIONS
  This report draws attention to the rarity of this disease and the paucity of information regarding CNS involvement in Ollier disease, as well as reviews the current literature.
authors.affiliation: Department of Oncology, Montefiore Medical Center, New York, USA.
authors.forename: Srikanth
authors.initials: S
authors.lastname: Gajavelli
authors.affiliation: Department of Neurosuregry, Montefiore Medical Center, New York, USA.
authors.forename: Jonathan
authors.initials: J
authors.lastname: Nakhla
authors.affiliation: Department of Neurosuregry, Montefiore Medical Center, New York, USA.
authors.forename: Rani
authors.initials: R
authors.lastname: Nasser
authors.affiliation: Department of Neurosuregry, Montefiore Medical Center, New York, USA.
authors.forename: Reza
authors.initials: R
authors.lastname: Yassari
authors.affiliation: Department of Neurosuregry, Montefiore Medical Center, New York, USA; Department of Pathology, Montefiore Medical Center, New York, USA; Department of Neurology, Montefiore Medical Center, New York, USA.
authors.forename: Karen M
authors.initials: KM
authors.lastname: Weidenheim
authors.affiliation: Department of Neurology, Montefiore Medical Center, New York, USA.
authors.forename: Jerome
authors.initials: J
authors.lastname: Graber
keywords: Astrocytoma; IDH1 mutation; Ollier Disease; endochondroma; intracranial tumor