There are multiple definitions:

1. intracranial atherosclerosis(English)

   • a common etiology of ischemic stroke, probably leading to regional hypoperfusion in the brain
   • CICAS, CMB, CMI, CVA, EIGR, LKW, mRS, IS
   • Atherosclerosis /atherogenic, Brain (dys)function, Cerebrovascular event
   • https://doi.org…dis.2015.12.038

2. internal carotid artery stenosis(English)

   • aICAS, sICAS
   • Atherosclerosis /atherogenic, Vascular disease
   • https://doi.org…0/ijms232415645