Delayed Reconfiguration of a Guglielmi Detachable Coil Mass Associated with Late Occlusion of an Adjacent Aneurysm and Parent Vessel

61-year-old man with occlusion of both the left SCA and an aneurysm arising from the junction of the basilar artery and left SCA.

A, Left vertebral arteriogram shows an aneurysm arising from the basilar artery, between the origins of the left PCA and left SCA. A second aneurysm arises from the junction of the basilar artery and left SCA.

B, Right vertebral arteriogram shows complete angiographic occlusion of the larger aneurysm, and preservation of the parent vessels and small, adjacent aneurysm.

C, Left vertebral arteriogram shows complete occlusion of the treated aneurysm, with slow filling of the left SCA (arrows) and adjacent aneurysm.

D, Left vertebral arteriogram shows occlusion of the left SCA and adjacent aneurysm.

E, Lateral view of the coil mass immediately following embolization.

F, Lateral view of the coil mass at 2 years.