Abstract
The authors experienced two cases of miliary internal carotid aneurysms that were torn off at the neck during operative manipulation. The neck clipping could be done with difficulty partially including the wall of the parent artery. Reappearance of the aneurysm and its enlargement were observed shortly after the operation. It was considered that the reappearence was caused the clip slipping out in one case and by possible fragile tissue of the aneurysm remaning proximal to the clip in the other. Careful follow-up is needed in the case of aneurysms, especially of the IC, when the neck is torn off during the surgery.
