title: Intraspinal dissemination of intracranial hemangiopericytoma: Case report and literature review.
abstract: BACKGROUND
  The authors report the case of a 53-year-old woman suffering from thoracic myelopathy caused by intraspinal dissemination of hemangiopericytoma. In literature, hemangiopericytoma is commonly found as an intracranial lesion, and often hematogenously metastasizes to the bone or liver; however, intradural spinal dissemination is extremely rare.
  
  
  METHODS
  The patient presented with gait disturbance due to thoracic myelopathy 6 years after surgical treatment for intracranial hemangiopericytoma. Magnetic resonance imaging demonstrated intradural disseminated lesions compressing the spinal cord. Although the patient underwent resection of the intradural spinal tumor, the lesion was tightly adherent to the dorsal surface of the spinal cord. Therefore, it resulted in subtotal removal. Immediately after the surgery, symptoms related to the thoracic myelopathy resolved. The patient was free from disease progression for 14 months after whole spine radiotherapy.
  
  
  CONCLUSIONS
  Recognition of this type of progression is important in the clinical management of intracranial hemangiopericytoma because intradural spinal dissemination dramatically degrades neurological functions.
authors.affiliation: Department of Neurosurgery, Tohoku University, Graduate School of Medicine, Sendai, Japan; Department of Neurosurgery, Mansoura University, Mansoura, Egypt.
authors.forename: Hosam Shata Mohanmed
authors.initials: HS
authors.lastname: Ali
authors.affiliation: Department of Neurosurgery, Tohoku University, Graduate School of Medicine, Sendai, Japan; Department of Neurosurgery, Kohnan Hospital, Sendai, Japan.
authors.forename: Toshiki
authors.initials: T
authors.lastname: Endo
authors.affiliation: Department of Neurosurgery, Kohnan Hospital, Sendai, Japan.
authors.forename: Hidenori
authors.initials: H
authors.lastname: Endo
authors.affiliation: Department of Neurosurgery, Sendai Medical Center, Sendai, Japan.
authors.forename: Kensuke
authors.initials: K
authors.lastname: Murakami
authors.affiliation: Department of Neurosurgery, Tohoku University, Graduate School of Medicine, Sendai, Japan.
authors.forename: Teiji
authors.initials: T
authors.lastname: Tominaga
keywords: Hemangiopericytoma; myelopathy; spinal dissemination