Abstract
We report three cases of new growth and rupture of cerebral aneurysm after successful surgical treatment of previous aneurysms at other sites. Two patients had ruptured newly-developed aneurysms at the junction of the internal carotid and posterior communicating arteries, one after dipping of anterior communicating artery aneurysm, and the other after distal anterior cerebral artery aneurysm. These two patients had suffered from hypertension before their second operation. In the third case, anterior communicating artery aneurysm developed and ruptured after treatment involving combined internal carotid artery occlusion and extracranial-intracranial anastomosis for a giant aneurysm of the internal carotid artery. In this case, the new aneurysm appears to have developed due to long-term hemodynamic stress. In all three cases, newly-developed aneurysms were successfully clipped, and rupture of them was confirmed.
