title: [Sinus pericranii; a congenital swelling on the scalp].
abstract: BACKGROUND
  Sinus pericranii is a rare congenital disorder of the skull. It involves a venous connection between the intracranial and extracranial venous systems caused by a defect at the level of a cranial sinus.
  
  
  METHODS
  We present the case of a 20-year-old woman with a soft compressible swelling on the back of her head from birth. MRI examination revealed sinus pericranii. The treatment consisted of coagulating the venous connection and closing the cranial malformation.
  
  
  CONCLUSIONS
  In a patient with soft-tissue swelling on the back of the head that has been present since birth, differential diagnostics should extend beyond epidermoid cysts alone and also include consideration of sinus pericranii. This is particularly important if the swelling is in the midline.
authors.affiliation: Isala, Zwolle.
authors.forename: Wybren
authors.initials: W
authors.lastname: Prins
authors.forename: Wimar A
authors.initials: WA
authors.lastname: van den Brink
authors.forename: Rombout R
authors.initials: RR
authors.lastname: Kruse
mesh_terms: D003392:Cranial Sinuses / Q000473:pathology / Q000601:surgery; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D008279:Magnetic Resonance Imaging / Q000379:methods*; D012535:Scalp / Q000098:blood supply / Q000473:pathology; D020779:Sinus Pericranii / Q000175:diagnosis* / Q000473:pathology / Q000601:surgery*; D012886:Skull / Q000473:pathology; D055815:Young Adult