Occlusion of<unk>  sinus (most commonly superior sagittal and lateral sinuses) by thrombus
No precise prevalence or incidence established due to rarity of condition. However the disease is more prevalent in patients with thrombophilia, oral contraceptive use, and during pregnancy.
Median Age ~ 37 years
Female:Male ratio 3:1
Mainly a diverse group of hypercoagulable states
Cancer
Leukemia
Adenocarcinoma
Pregnancy (up to 6 weeks post-partum)
Polycythemia Vera
Sickle cell
Factor V Lediden
Protein S & C deficiency
Hyperhomocysteinemia
Behcets syndrome
Severe dehydration in infants and children, mainly in developing countries.
COVID-19 vaccines (rare)
1 per 1,000,000 for the Ad26.COV2.S (Johnson & Johnson And Janssen brands)
1 per 100,000 for the ChAdOx1 nCoV-19 (AstraZeneca brand)
Local infections (otitis media, sinusitis, cellulitis, dental infections)
Mastoiditis common cause in developing countries.
Direct cranial Trauma & neurosurgical procedures
Compression of<unk>  sinus (tumor, abscess)
Cancer
Leukemia
Adenocarcinoma
Pregnancy (up to 6 weeks post-partum)
Polycythemia Vera
Sickle cell
Factor V Lediden
Protein S & C deficiency
Hyperhomocysteinemia
Behcets syndrome
Leukemia
Adenocarcinoma
1 per 1,000,000 for the Ad26.COV2.S (Johnson & Johnson And Janssen brands)
1 per 100,000 for the ChAdOx1 nCoV-19 (AstraZeneca brand)
Mastoiditis common cause in developing countries.
Cerebral venous thrombosis
Migraine headache
Brain abscess
Tension headache
Subarachnoid hemorrhage
Cluster headache
Vertebral and carotid artery dissection
Meningitis/encephalitis