J Korean Neurosurg Soc.  2012 Sep;52(3):243-245.

Spontaneous Regression of an Unruptured and Non-Giant Intracranial Aneurysm

• Choi CY
• Han SR
• Yee GT
• Lee CH

Abstract

It is well known that spontaneous thrombosis in giant cerebral aneurysm is common. However, spontaneous obliteration of a non-giant and unruptured cerebral aneurysm has been reported to be rare and its pathogenic mechanism is not clear. We describe a case with rare vascular phenomenon and review the relevant literatures.

Keyword

Non-giant cerebral aneurysm; Spontaneous thrombosis; Unruptured cerebral aneurysm

MeSH Terms

Intracranial Aneurysm
Thrombosis

Figure

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  Fig. 1 A : Computed tomography angiogram shows an unruptured, small, saccular aneurysm (white arrow) which is located at the left middle cerebral artery trifurcation. Aneurysm has a relatively long and narrow neck. Aneurysm size, aspect ratio, and aneurysm angle are 4.5 mm, 3, and 90 degrees respectively. B : Small saccular aneurysm (white arrow) in the left sylvian fissure is seen on enhanced axial CT image.

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  Fig. 2 magnetic resonance angiogram performed at 1 year follow-up shows no interval changes of aneurysm size and shape.

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  Fig. 3 A : Computed tomography angiogram performed at 3-year follow-up shows a near total obliteration of cerebral aneurysm with small residual neck remnant (white arrow). B : There is no high density lesion suggesting of intra-aneurysmal thrombus and small residual neck remnant (white arrow) are seen on enhanced axial CT image.

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