Spontaneous Isolated Posterior Communicating Artery Dissection in a Young Adult with

Summary: A 28-year-old man presented with an acute spontaneous dissection of the left posterior communicating artery with associated ipsilateral thalamic and internal capsular infarctions. Positive risk factors included smok-ing and family history of ischemic heart disease. He was also found to have hyperhomocysteinemia, which has been implicated as a risk factor for spontaneous cervical artery dissection, but to date, no association has been shown with spontaneous intracranial arterial dissection. Cervical artery dissection accounts for up to 20 % of ischemic strokes in young adult patients (1, 2). Spon-taneous nontraumatic intracranial arterial dissections are less frequently encountered. Most of the latter occur in the vertebrobasilar circulation, including the posterior cerebral arteries (3). To date, we have no