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Cerebral venous sinus thrombosis
1Department of Neurology, Leicester Royal Infirmary, Infirmary Square, Leicester LE1 5WW, UK.
Insights
Cerebral venous sinus thrombosis (CVST) is often missed due to varied symptoms. Prompt diagnosis and heparin treatment lead to favorable outcomes for this challenging neurological condition.
Area of Science:
- Neurology
- Vascular Medicine
- Radiology
Background:
- Cerebral venous sinus thrombosis (CVST) presents with diverse symptoms, often leading to delayed diagnosis.
- It affects all age groups, with the superior sagittal sinus being commonly involved.
- Underlying causes include inflammatory diseases and coagulation disorders, though some cases remain idiopathic.
Purpose of the Study:
- To highlight the diagnostic challenges and clinical spectrum of cerebral venous sinus thrombosis.
- To emphasize the importance of advanced imaging techniques for accurate diagnosis.
- To outline current first-line treatment strategies and prognosis for CVST.
Main Methods:
- Literature review focusing on clinical presentation, etiology, diagnostic modalities, and treatment of CVST.
- Analysis of diagnostic accuracy comparing MRI venography and CT scans.
- Evaluation of treatment efficacy and safety of anticoagulation therapies.
Main Results:
- CVST diagnosis is frequently delayed due to non-specific symptoms ranging from headache to coma.
- Magnetic resonance imaging with venography is superior to CT alone for detecting CVST.
- Intravenous heparin is the established first-line treatment, with oral anticoagulation for 3-6 months post-treatment.
Conclusions:
- A high index of clinical suspicion is crucial for diagnosing CVST.
- Early and accurate diagnosis using MRI venography facilitates timely initiation of effective heparin therapy.
- Prognosis for cerebral venous sinus thrombosis is generally favorable with appropriate management.
Abstract:
Cerebral venous sinus thrombosis is a challenging condition because of its variability of clinical symptoms and signs. It is very often unrecognised at initial presentation. All age groups can be affected. Large sinuses such as the superior sagittal sinus are most frequently involved. Extensive collateral circulation within the cerebral venous system allows for a significant degree of compensation in the early stages of thrombus formation. Systemic inflammatory diseases and inherited as well as acquired coagulation disorders are frequent causes, although in up to 30% of cases no underlying cause can be identified. The oral contraceptive pill appears to be an important additional risk factor. The spectrum of clinical presentations ranges from headache with papilloedema to focal deficit, seizures and coma. Magnetic resonance imaging with venography is the investigation of choice; computed tomography alone will miss a significant number of cases. It has now been conclusively shown that intravenous heparin is the first-line treatment for cerebral venous sinus thrombosis because of its efficacy, safety and feasability. Local thrombolysis may be indicated in cases of deterioration, despite adequate heparinisation. This should be followed by oral anticoagulation for 3-6 months. The prognosis of cerebral venous sinus thrombosis is generally favourable. A high index of clinical suspicion is needed to diagnose this uncommon condition so that appropriate treatment can be initiated.