title: Basilar skull fracture: a risk factor for transverse/sigmoid venous sinus obstruction.
abstract: In trauma practice, basilar skull fracture is an extremely common finding while transverse/sigmoid venous sinus thrombosis is generally considered quite a rare complication. During evaluation of cervical computed tomography (CT) angiography after trauma, we identified five patients in just three months with unexpected transverse/sigmoid venous sinus obstruction ipsilateral to a basilar skull fracture. This number represented a surprisingly high percentage of our neurosurgical trauma consults for the study period (31%). Three of the five patients were found to have sinus thrombosis: two with right transverse/sigmoid sinus thrombosis experienced significant neurological deficits and prolonged hospital courses even with anti-coagulation therapy; one patient with a left transverse/sigmoid sinus thrombosis had a good outcome with anti-coagulation therapy. The other two of the five patients had outflow obstruction, likely from focal epidural bleeding and extrinsic compression: one patient with partial obstruction in the right transverse-sigmoid junction, due to epidural bleeding, experienced a difficult recovery; one patient with a right sigmoid sinus obstruction presented and remained asymptomatic and experienced a benign hospital course. Two of the five patients had a posterior temporal hemorrhagic area ipsilateral to the affected sinus, suggesting that this finding may have represented hemorrhagic venous infarction rather than traumatic contusion. We propose that a basilar skull fracture in the region of temporal or occipital bone should be considered as a significant risk factor for the development of transverse/sigmoid venous sinus obstruction and may be an under-recognized and treatable cause of increased intracranial pressure. Failure to detect this complication may explain, in part, unexpected clinical outcomes.
authors.affiliation: Inova Regional Neurosurgery Service, Department of Neuroscience, Inova Fairfax Hospital, Falls Church, Virginia, USA.
authors.forename: Xueren
authors.initials: X
authors.lastname: Zhao
authors.forename: Anne
authors.initials: A
authors.lastname: Rizzo
authors.forename: Bobby
authors.initials: B
authors.lastname: Malek
authors.forename: Samir
authors.initials: S
authors.lastname: Fakhry
authors.forename: Joseph
authors.initials: J
authors.lastname: Watson
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000925:Anticoagulants / Q000627:therapeutic use; D002533:Cerebral Angiography; D005260:Female; D015600:Glasgow Coma Scale; D006493:Heparin / Q000627:therapeutic use; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D012307:Risk Factors; D012851:Sinus Thrombosis, Intracranial / Q000000981:diagnostic imaging / Q000188:drug therapy / Q000209:etiology*; D020205:Skull Fracture, Basilar / Q000150:complications* / Q000000981:diagnostic imaging; D014057:Tomography, X-Ray Computed; D014859:Warfarin / Q000627:therapeutic use
chemical_list: D000925:Anticoagulants; D014859:Warfarin; D006493:Heparin