intracranial sinus thrombosis lateral sinus thrombosis https://www.malacards.org/card/lateral_sinus_thrombosis MEDGEN:124359 MESH:D020227 DOID:3574 MONDO:0002693 SCTID:192761004 UMLS:C0270639 Formation or presence of a blood clot (thrombus) in the lateral sinuses. This condition is often associated with ear infections (otitis media or mastoiditis) without antibiotic treatment. In developed nations, lateral sinus thrombosis can result from craniocerebral trauma; brain neoplasms; neurosurgical procedures; thrombophilia; and other conditions. Clinical features include headache; vertigo; and increased intracranial pressure.