title: Intraventricular solitary fibrous tumor: an unusual tumor with radiological, ultrastructural, and immunohistochemical evaluation: case report.
abstract: OBJECTIVE
  Intracranial solitary fibrous tumors have been described previously, but intraventricular solitary fibrous tumors are extremely rare. We present what is, to our knowledge, the first reported case of solitary fibrous tumor in the third ventricle.
  
  
  METHODS
  A 63-year-old man presented with weakness of his lower extremities and headaches. Computed tomography and magnetic resonance imaging of the brain revealed an enhancing mass in the posterior part of the third ventricle.
  
  
  METHODS
  The tumor originated from the wall of the left internal cerebral vein and extended to the posterior part of the third ventricle. Nearly total excision was performed via an infratentorial-supracerebellar approach.
  
  
  CONCLUSIONS
  The differential diagnosis of intracranial solitary fibrous tumors includes fibroblastic meningioma, meningeal hemangiopericytoma, neurofibroma, and schwannoma. The differential diagnosis in the present case was greatly helped by the immunohistochemical and ultrastructural findings, along with a disease-free 3.5-year follow-up. These findings are presented with reference to previous reports.
authors.affiliation: Department of Neurosurgery, Inönü University Faculty of Medicine, Malatya, Turkey. akocak@inonu.edu.tr
authors.forename: Ayhan
authors.initials: A
authors.lastname: Koçak
authors.forename: Süleyman Rüştü
authors.initials: SR
authors.lastname: Cayli
authors.forename: Kaya
authors.initials: K
authors.lastname: Saraç
authors.forename: Nasuhi Engin
authors.initials: NE
authors.lastname: Aydin
mesh_terms: D002551:Cerebral Ventricle Neoplasms / Q000000981:diagnostic imaging* / Q000378:metabolism / Q000648:ultrastructure*; D005350:Fibroma / Q000000981:diagnostic imaging* / Q000378:metabolism / Q000648:ultrastructure*; D006801:Humans; D008297:Male; D008875:Middle Aged; D011859:Radiography