AN INTRACRANIAL CAROTID ANEURYSM OF LONG DURATION *

DURING the past decade, numerous articles dealing with intracranial arterial aneurysms have been published.1-12 Because, with a rare exception,13 they have all appeared in special journals it is likely that many physicians are still un-familiar with this not infrequent condition. In 1102 consecutive necropsies (excluding stillbirths), in which the head was examined, the records of The Jewish Hospital of Brooklyn reveal 9 aneurysms of intracranial arteries. This is an incidence of 0.8 per cent. Other writers give an incidence of 0.5 per cent to 1.5 per cent.14 Etiologically, aneurysm of the intracranial arteries may be classified as arteriosclerotic, congenital, mycotic, syphilitic and traumatic. In arteriosclerosis, the uneven fatty ai.d fibrous changes in the vessel wall probably result in weak-ening, bulging at some point and, consequently, the formation * of an aneurysm. Often, this is hastened or aggravated by the associated vascular hypertension. The congenital group comprises those aneurysms which occur in young people and to which no specific cause can be assigned. It is agreed by a number o