Cerebral ischaemic stroke due to unspecified occlusion or stenosis of intracranial large artery

**Definition:** This is a sudden loss of brain function due to a lack of adequate blood flow of the large intracranial arteries.

**Exclusions:** - Cerebral ischaemic stroke due to intracranial large artery atherosclerosis - Cerebral ischaemic stroke due to embolic occlusion - Cerebral ischaemic stroke due to other known cause