Spontaneous Dissecting Aneurysms of the Cervical Internal Carotid Artery

Abstract
Three cases of spontaneous dissecting aneurysms of the internal carotid artery are described. The important points common to these 3 patients were: All were in the 4th decade of life and came to necropsy within 6 months of each other. There was no history or necropsy evidence of trauma to the head or neck in any of them. Dissection of blood through the deeper or external layers of the media of the nonatheroma-tous origin of the internal carotid occurred in all of them. In each case the ipsilateral middle cerebral artery contained thrombus. Ipsilateral cerebral infarction occurred in all cases. In all there was cystic degeneration of the media of the internal carotid and other arteries.