MedGen

A reduction in the number of circulating thrombocytes. [from HPO]

The formation of a blood clot in the lumen of a vessel or heart chamber; causes include coagulation disorders and vascular endothelial injury. [from NCI]

An intracranial thrombosis of the venous sinuses. These typically present with headache, seizures or venous stroke secondary to raised cerebral venous pressure. Cerebral venous sinus thromboses usually affect larger areas of brain parenchyma than those affected by cerebral vein thromboses. [from HPO]

Formation or presence of a blood clot (thrombus) in the cranial sinuses, large endothelium-lined venous channels situated within the skull. Intracranial sinuses, also called cranial venous sinuses, include the superior sagittal, cavernous, lateral, petrous sinuses, and many others. Cranial sinus thrombosis can lead to severe headache; seizure; and other neurological defects. [from MONDO]