The circle of Willis is a junction of several important arteries at the bottom part of the brain. Learn more about its anatomy, function, and more.

The posterior communicating artery (PCOM) is a part of a group of arteries in the brain known as the circle of Willis. The artery connects the internal carotid and the posterior cerebral arteries.

With a carotid stent, dilation balloon, and integrated embolic protection (IEP) filter for added safety, the system also ...