Gyriform cortical/subcortical T1 hyperintensity

May Be Caused by

 Common

Chronic cortical infarction

Chronic subarachnoid hemorrhage

Late subacute cortical infarction

Subacute cortical infarction

Subacute subarachnoid hemorrhage

 Uncommon

Cortical arteriovenous malformation

Dural arteriovenous malformation

Dural neoplasm

Leptomeningeal neoplasm

Meningitis