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Review
. 2005 Apr;26(4):917-21.

Aneurysm regression after coil embolization of a concurrent aneurysm

Michael M Chow  1 , William E Thorell, Peter A Rasmussen
Affiliations
Review

Aneurysm regression after coil embolization of a concurrent aneurysm

Michael M Chow et al. AJNR Am J Neuroradiol. 2005 Apr.

Abstract

A 43-year-old woman with two incidental paraclinoid internal carotid artery aneurysms underwent coil embolization of the larger superior hypophyseal aneurysm and 10 weeks later underwent follow-up angiography that showed regression of the smaller, more distal paraclinoid aneurysm. We demonstrate that, although it is a rare occurrence, aneurysms can involute. We discuss potential mechanisms of this phenomenon and review the literature on aneurysm regression.

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Figures

F<sc>ig</sc> 1.
Fig 1.
AP (A) and lateral (B) right ICA angiograms show a 9-mm superior hypophyseal aneurysm and a 4-mm ventral paraclinoid ICA aneurysm before coil embolization.
F<sc>ig</sc> 2.
Fig 2.
AP (A) and lateral (B) right ICA angiograms obtained immediately after coil embolization of the larger superior hypophyseal aneurysm. The smaller, ventral paraclinoid ICA aneurysm remains unchanged.
F<sc>ig</sc> 3.
Fig 3.
AP (A), lateral (B), and 3D rotational (C) right ICA angiograms at 10 weeks display complete regression of the previously visualized ventral paraclinoid ICA aneurysm.
F<sc>ig</sc> 4.
Fig 4.
AP (A), lateral (B), and 3D rotational (C) right ICA angiograms at 10 months display a stable coil configuration within the superior hypophyseal artery aneurysm and continued absence of the ventral paraclinoid ICA aneurysm.
See this image and copyright information in PMC

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