How often do sinus thrombosis episodes occur ?

?cerebral?: Blood flow in the brain drains through specific channels called sinuses. These sinuses have slow flowing blood that can block up and produce severe pressure and brain dysfunction. The blood within the sinuses may clog up with clotting or thrombosis. This is usually due to severe dehydration or infection that inflames the sinus tracts. Certain blood disorders such as sickle cell raise the risk.

Rare: Studies show 3-4/million population. Usually in third decade of life, female moreso than male. Autopsy in elderly 9%.