Cerebral Venous Sinus Thrombosis (CVST) Clinical Presentation and Diagnosis

Clinical Presentation

Headache is the most common symptom of CVST, occurring in nearly 90% of patients, and is typically diffuse and progressively worsens over days to weeks, according to the American Heart Association 1, 2
Seizures occur in 40% of patients, both focal and generalized, as reported by the American Academy of Neurology 1, 2
Focal neurological deficits, most commonly hemiparesis and aphasia, are present in CVST patients, as stated by the American Stroke Association 1, 3
Papilledema and diplopia (sixth nerve palsy) due to increased intracranial pressure are common manifestations of CVST, according to the American Academy of Neurology 1, 4
Altered mental status, especially with deep venous system involvement, is a significant symptom of CVST, as reported by the American Heart Association 5, 6

D-dimer may be elevated in CVST patients, but a normal level doesn't exclude the condition, especially with limited clot burden, as stated by the American College of Cardiology 7, 5
Routine blood studies, including CBC, chemistry, PT, and aPTT, should be performed in CVST patients, according to the American Heart Association 7, 3
Non-contrast CT is often normal in CVST patients, but may show hyperdensity of cortical vein/dural sinus or "empty delta" sign on contrast-enhanced CT, as reported by the American Stroke Association 8, 5
MRI with MR venography is more sensitive than CT for detecting CVST, according to the American Academy of Neurology 8, 6

Dehydration is a risk factor for CVST, as stated by the American Heart Association 2
Prothrombotic conditions are a significant risk factor for CVST, according to the American College of Cardiology 7, 3

MRI with MR venography is more sensitive than CT for detecting cerebral venous thrombosis (CVT), especially in cases with bilateral thalamic lesions from deep venous system involvement, as noted by the Stroke journal 9
The American Heart Association notes that anatomic variability makes CT diagnosis insensitive, highlighting the importance of MRI with MR venography for accurate CVT diagnosis 9
In cases where MRV is equivocal but clinical suspicion remains high, digital subtraction angiography (DSA) remains the gold standard and should be pursued, particularly for isolated cortical vein thrombosis, as recommended by the World of Neurosurgery journal 10

For young to middle-aged women with thrombophilia, pregnancy, or oral contraceptive use presenting with headache, seizures, or focal deficits, MRI with MR venography should be obtained immediately if CVT is suspected, especially in cases with progressive headache, papilledema, or diplopia, as suggested by the Stroke journal 9
A normal D-dimer cannot exclude CVT, and if clinical suspicion is high, proceed with imaging regardless of D-dimer results, as recommended by the Stroke journal 9