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Year : 2004  |  Volume : 52  |  Issue : 1  |  Page : 123-124

Superior sagittal sinus and torcula thrombosis in minor head injury

Department of Neurological Sciences, Christian Medical College and Hospital, Vellore - 632004

Correspondence Address:
Department of Neurological Sciences, Christian Medical College and Hospital, Vellore - 632004

  »  Abstract

A 27-year-old man suffered a relatively minor trauma. He developed signs of raised intracranial pressure three days after injury. Investigations revealed superior sagittal sinus and torcular thrombosis.

How to cite this article:
Kumar G S, Chacko A G, Joseph M. Superior sagittal sinus and torcula thrombosis in minor head injury. Neurol India 2004;52:123-4

How to cite this URL:
Kumar G S, Chacko A G, Joseph M. Superior sagittal sinus and torcula thrombosis in minor head injury. Neurol India [serial online] 2004 [cited 2023 Dec 11];52:123-4. Available from:

  »   Introduction Top

Post-traumatic superior sagittal sinus and torcula thrombosis is rare. Various mechanisms in its pathogenesis have been postulated but mortality and morbidity remain high. We report such a case and discuss the treatment protocol.

  »   Case Report Top

A 27-year-old man presented a few hours after a head injury and brief loss of consciousness. When admitted he was irritable but had no focal neurological deficits. There was a scalp laceration in the midline occipital region with an underlying linear fracture. The laceration was sutured and he was admitted for observation as the fracture line extended across the sagittal sinus. A plain computed tomogram (CT) of the brain showed a crack fracture of the occipital bone on the right side, which extended to the midline. Rest of the brain was normal [Figure - 1]. Seventy-two hours after the trauma he developed headache and vomiting and developed bilateral sixth cranial nerve pareses. Fundoscopy revealed papilledema. A magnetic resonance angiogram (MRA) showed a block in the anterior third of the superior sagittal sinus and a thrombus partly occluding the confluence of sinuses [Figure - 2]. The patient was placed on anticonvulsants and anti-edema drugs and heparin with which his symptoms improved over five days. Heparin was then changed to oral anticoagulants and he was discharged when he was asymptomatic.

  »   Discussion Top

Thrombosis of the superior sagittal sinus (SSST) and torcula is rare and is usually attributed to scalp or skull infections, oral contraception, dehydration, pregnancy, blood dyscrasias and metabolic derangements.[1],[2] Although post-traumatic SSST has been reported, it still remains an unusual complication of traumatic brain injury. The high mortality rate (40%-80%)[3] stresses the need for early diagnosis and treatment.
The diagnosis is based on a high index of clinical suspicion, confirmed by imaging. General symptoms and signs are headache and seizures due to cerebral venous infarcts.[4] Buonanno et al[3] reported 11 cases of SSST diagnosed with CT and later confirmed by angiography or autopsy. A reliable finding on CT is the “empty triangle” sign seen on contrast films in the cuts slicing perpendicularly across the posterior aspect of the sinus. The “empty triangle” is due to the presence of an isodense clot within the sinus enclosed by an area of engorged vessels. Less specific findings include small ventricles, gyral enhancement in a distribution of venous infarct and multiple focal bilateral parasagittal hemorrhages.
The pathogenesis of SSST is not well established. Carrie and Jaffe[5] state that abnormalities in the clotting mechanism, disturbances in blood flow or damage to the capillary endothelium may predispose and lead to thrombosis. Alteration in coagulation after head injury has been documented supporting this hypothesis.[6]
Treatment includes maintaining good hydration, and the administration of anti-edema agents like dexamethasone and mannitol. Anticonvulsants are necessary to prevent seizures. There are reports of the successful management of SSST with heparin and urokinase, including the restoration of the patency of the sagittal sinus with continuous urokinase infusion directly into the sinuses via a transfemoral transvenous microcatheter.[7],[8] 

  »   References Top

1.Towbin A. The syndrome of latent cerebral venous thrombosis: Its frequency and relation to age and congestive heart failure. Stroke 1973;4:419-30.  Back to cited text no. 1  [PUBMED]  
2.Gettelfinger DM, Kokmen E. Superior sagittal sinus thrombosis Arch Neurol 1997;34:2-6.  Back to cited text no. 2    
3.Buonanno FS, Moody DM, Ball MR, Laster DW. Computed cranial tomogrpahic findings in cerebral sinovenous occlusion. J Comput Assist Tomogr 1978;2:281-90.  Back to cited text no. 3    
4.Martin JP. Signs of obstruction of the superior sagittal sinus following closed head injuries. Br Med J 1955;2:467-70.  Back to cited text no. 4    
5.Carrie AW, Jaffe FA. Thrombosis of superior sagittal sinus caused by trauma without penetrating injury. J Neurosurg 1954;11;173-82.  Back to cited text no. 5    
6.van der Sande JJ, Veltkamp JJ, Boekhout-Mussert RJ, Bouwhuis-Hoogerwerf ML. Head injury and coagulation disorders. J Neurosurg 1978;49:357-65.  Back to cited text no. 6    
7.DoRocco C, Iannelli A, Leone G, Moschini M, Valori VM. Heparin Urokinase treatment in aseptic dural sinus thrombosis. Arch Neurol 1981;38:431-5.  Back to cited text no. 7    
8.D'Alise MD, Fichtel F, Horrowitz M. Sagittal sinus thrombosis following minor head injury with continuous urokinase infusion. Surg Neurol 1998;49:430-5.  Back to cited text no. 8    


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