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CC BY-NC-ND 4.0 · Asian J Neurosurg 2020; 15(04): 1055-1058
DOI: 10.4103/ajns.AJNS_281_20
Case Report

Spontaneous disappearance of an intracranial small unruptured aneurysm on magnetic resonance angiography: Report of two cases

Yu Akimoto
Department of Neurosurgery, Tsukuba Memorial Hospital, Tsukuba, Ibaraki
,
Kiyoyuki Yanaka
Department of Neurosurgery, Tsukuba Memorial Hospital, Tsukuba, Ibaraki
,
Kuniyuki Onuma
Department of Neurosurgery, Tsukuba Memorial Hospital, Tsukuba, Ibaraki
,
Kazuhiro Nakamura
Department of Neurosurgery, Tsukuba Memorial Hospital, Tsukuba, Ibaraki
,
Nobuyuki Takahashi
1   Department of Radiology, Tsukuba Memorial Hospital, Tsukuba, Ibaraki
,
Eiichi Ishikawa
2   Department of Neurosurgery, Institute of Clinical Medicine, University of Tsukuba, Tsukuba, Ibaraki
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Spontaneous radiographic disappearance of cerebral aneurysms is often observed under special conditions such as giant aneurysms. However, spontaneous disappearance of an unruptured and nongiant intracranial saccular aneurysms is rare. We describe two cases of this rare vascular phenomenon. The first patient is a 64-year-old female diagnosed with a small unruptured aneurysm arising from the distal anterior cerebral artery. Spontaneous disappearance of the aneurysm on magnetic resonance angiography (MRA) was observed 5 years after the initial diagnosis. Continuous imaging surveillance also revealed spontaneous reappearance of the aneurysm 2 years later. The second patient is a 57-year-old female harboring a small unruptured saccular aneurysm arising from the M1–M2 bifurcation of the middle cerebral artery. The aneurysm showed spontaneous disappearance on MRA 13 years after the initial diagnosis. These cases provide a new insight into this natural dynamic process even in cases of a small unruptured intracranial saccular aneurysm.

Key-words:

Spontaneous disappearance - thrombosis - unruptured cerebral aneurysm

Financial support and sponsorship

Nil.




Publikationsverlauf

Eingereicht: 07. Juni 2020

Angenommen: 13. Juli 2020

Artikel online veröffentlicht:
16. August 2022

© 2020. Asian Congress of Neurological Surgeons. This is an open access article published by Thieme under the terms of the Creative Commons Attribution-NonDerivative-NonCommercial License, permitting copying and reproduction so long as the original work is given appropriate credit. Contents may not be used for commercial purposes, or adapted, remixed, transformed or built upon. (https://creativecommons.org/licenses/by-nc-nd/4.0/)

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