• S Fujiwara, K Fujii, and M Fukui.
• Department of Neurosurgery, Faculty of Medicine, Kyushu University, Fukuoka, Japan.
• Acta Neurochir (Wien). 1993 Jan 1; 120 (1-2): 20-5.

AbstractWe herein report the long term results of 27 intracranial internal carotid artery (ICA) aneurysms treated by indirect surgery such as a trapping of the aneurysm or carotid ligation either with or without EC-IC bypass. These patients were then followed for a mean period of 10 years. Seventy-four percent of the aneurysms were categorized as either being giant or large. Late complications were observed in 7 patients. A rupture of newly formed aneurysms at the anterior communicating artery occurred in 2 cases 8 or 9 years after either trapping or performing a ICA ligation, respectively. In these patients, previous angiography could not reveal any abnormalities at the anterior communicating artery. A rupture of a contralateral ICA aneurysm was seen in a patient whose ipsilateral ICA was ligated for a ICA aneurysm 22 years previously. An enlargement of the contralateral giant cavernous ICA aneurysm became symptomatic 6 years after a partial ligation of the ICA combined with an EC-IC bypass for a giant cavernous carotid artery aneurysm on the other side. Two cases of sudden death occurred in a young patient and an elderly patient with a small anterior communicating artery aneurysm, 9 and 19 years respectively, after trapping of the ICA aneurysms, although the cause could not be definitely ascertained. Rebleeding occurred in one patient who died 8 years after a carotid ligation and a partial clipping of the ICA aneurysm. Haemodynamic stress may therefore play a major role in inducing new aneurysms or growing aneurysms.(ABSTRACT TRUNCATED AT 250 WORDS)

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