intracranial sinus thrombosis https://www.malacards.org/card/intracranial_sinus_thrombosis 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. MEDGEN:20771 DOID:3572 MONDO:0002692 UMLS:C0037198 MESH:D012851 intracranial thrombosis