title: Calvarial metastasis of a paraganglioma. Case report and review of the literature.
abstract: BACKGROUND
  Metastasis of a paraganglioma (PRG) to the calvarium is very rare. In this paper, the case of a 25-year-old male with metastasis of a PRG to the frontoparietal bone is described.
  
  
  METHODS
  The patient presented with bulging on the left side of the head, headache, and weight loss. Magnetic resonance imaging (MRI) revealed a mass lesion in the left frontoparietal region that had destroyed both the external and internal table of the bone, extending under the skin and above the dura mater. After a frontoparietal craniotomy the tumor was removed totally. Histopathological examination revealed the "Zellballen," which are pathognomonic for a PRG. Systemic examination and radiological investigation revealed no primary tumor source.
  
  
  CONCLUSIONS
  Metastasis of a PRG to the calvarium is possible; radical removal of the tumor will provide a cure.
authors.affiliation: Department of Neurosurgery, The Abant Izzet Baysal University, Düzce School of Medicine, Turkey.
authors.forename: F
authors.initials: F
authors.lastname: Gezen
authors.forename: I M
authors.initials: IM
authors.lastname: Ziyal
authors.forename: A
authors.initials: A
authors.lastname: Baysefer
authors.forename: S
authors.initials: S
authors.lastname: Kahraman
authors.forename: O
authors.initials: O
authors.lastname: Ciklatekerlioglu
mesh_terms: D000328:Adult; D006801:Humans; D008297:Male; D009382:Neoplasms, Unknown Primary; D010235:Paraganglioma / Q000175:diagnosis* / Q000556:secondary* / Q000601:surgery; D012888:Skull Neoplasms / Q000175:diagnosis* / Q000556:secondary* / Q000601:surgery