Congenital hypoplasia of the internal carotid artery

Case contributed by Dr Mohamed Saber

Presentation

Incidental finding in the workup of cerebral hemorrhagic venous infarction.

Patient Data

Age: 45 years
Gender: Female

MRA shows the following:

  • markedly hypoplastic left internal carotid artery supplying the left ophthalmic artery
  • hypoplastic/aplastic A1 segment of the left ACA
  • the left posterior cerebral artery supplies the left middle cerebral artery via a large posterior communicating artery
  • normal appearance of the anterior and middle cerebral arteries
  • normal appearance of vertebrobasilar and posterior cerebral arteries

Case Discussion

Here is a case of congenital hypoplasia of the internal carotid artery, one of the forms of congenital absence of the internal carotid artery (ICA), a term that encompasses agenesis, aplasia, and hypoplasia.

Many of these cases remain asymptomatic and go undetected, however, it is occasionally associated with cerebral aneurysms.

How to use cases

You can use Radiopaedia cases in a variety of ways to help you learn and teach.

Creating your own cases is easy.