title: Prenatal MR imaging of dural sinus malformation: a case report.
abstract: OBJECTIVE
  To describe prenatal magnetic resonance imaging (MRI) findings of dural sinus malformation (DSM), a very rare, congenital form of dural arteriovenous shunt (DAVS), typically affecting newborns.
  
  
  METHODS
  Ultrasound (US) and MRI were performed at 34 weeks' gestation, and the findings of these examinations were compared with postnatal MRI studies performed at 2 days and 1 month.
  
  
  RESULTS
  US showed an anechoic, midline posterior fossa collection with irregular internal echodensities. Color Doppler showed prominent arterial vascularity at the lesion margins. The prenatal MRI showed a large, profoundly hypointense, midline retrocerebellar mass. Postnatal MRI, complemented with magnetic resonance (MR) angiography, showed the lesion to be a giant dural venous pouch fed by multiple mural arteriovenous shunts. Follow-up MRI at 1 month suggested latent venous hypertension and prompted endovascular treatment.
  
  
  CONCLUSIONS
  Prenatal MR imaging is useful to establish the diagnosis, to assess complications such as hydrocephalus and tonsillar prolapse, and to help plan perinatal management, postnatal follow-up, and treatment decision-making.
authors.affiliation: Department of Pediatric Neuroradiology, G. Gaslini Children's Hospital, Genoa, Italy. andrearossi@ospedale-gaslini.ge.it
authors.forename: Andrea
authors.initials: A
authors.lastname: Rossi
authors.forename: Pierangela
authors.initials: P
authors.lastname: De Biasio
authors.forename: Eloisa
authors.initials: E
authors.lastname: Scarso
authors.forename: Carlo
authors.initials: C
authors.lastname: Gandolfo
authors.forename: Marco
authors.initials: M
authors.lastname: Pavanello
authors.forename: Giovanni
authors.initials: G
authors.lastname: Morana
authors.forename: Pier Luigi
authors.initials: PL
authors.lastname: Venturini
authors.forename: Paolo
authors.initials: P
authors.lastname: Tortori-Donati
mesh_terms: D000328:Adult; D020785:Central Nervous System Vascular Malformations / Q000175:diagnosis* / Q000000981:diagnostic imaging / Q000196:embryology / Q000473:pathology / Q000628:therapy; D002533:Cerebral Angiography; D003392:Cranial Sinuses / Q000002:abnormalities* / Q000000981:diagnostic imaging / Q000196:embryology / Q000473:pathology; D003937:Diagnosis, Differential; D004621:Embolization, Therapeutic; D005260:Female; D006801:Humans; D007231:Infant, Newborn; D008279:Magnetic Resonance Imaging; D008297:Male; D011247:Pregnancy; D011263:Pregnancy Trimester, Third; D011296:Prenatal Diagnosis; D014463:Ultrasonography