Anterior choroidal artery syndrome

Last revised by Adam Jasne on 18 Mar 2024

Anterior choroidal artery syndrome is a rare entity caused by cerebral infarction in the anterior choroidal artery territory.

In its complete form, the syndrome is characterized by the triad of 7:

  • contralateral hemiplegia

  • contralateral hemisensory loss

  • contralateral homonymous hemianopia

Incomplete forms of the syndrome are more common than that of complete forms 7. The syndrome may also be associated with neuropsychological disorders, including left neglect syndrome in right-sided lesions and disorders of language in left-sided lesions 7.

Complete anterior choroidal artery ichaemic strokes are usually due to cardioembolism or internal carotid artery stenosis. Smaller strokes involving only parts of the territory are typically due to traditional cerebrovascular risk factors, such as type 2 diabetes mellitus, hypertension and hyperlipidemia 5. The classic triad of symptoms of a complete syndrome are rare because of the anastomosis with perforators from the middle cerebral, posterior cerebral and posterior communicating arteries.

The anterior choroidal artery has an extensive area of supply and large variations in its distributed territory 6. As a result of its extensive and strategic supply, anterior choroidal artery infarcts can often be confused with posterior cerebral artery or middle cerebral artery infarcts 6.

ADVERTISEMENT: Supporters see fewer/no ads