ISSN: 1899-0967
Polish Journal of Radiology
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vol. 86
Interventional radiology
Case report

Iatrogenic pericallosal artery aneurysm after endovascular procedure

Paweł Brzegowy
Katarzyna Ciuk
Bartłomiej Łasocha
Osit Chukwu
Borys Kwinta
Andrzej Urbanik
Tadeusz J. Popiela

Chair of Radiology, Jagiellonian University Medical College, Krakow, Poland
Students’ Scientific Group, Chair of Radiology, Jagiellonian University Medical College, Krakow, Poland
Department of Radiology, University Hospital in Krakow, Poland
Department of Neurosurgery and Neurotraumatology, Jagiellonian University Medical College, Krakow, Poland
Pol J Radiol 2021; 86: e50-e52
Online publish date: 2021/01/18
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Iatrogenic brain aneurysms are rare and are usually a result of direct trauma to the arterial wall during various neuro­surgical or endovascular procedures. Single cases of pericallosal posttraumatic and postsurgical aneurysms were previously reported. Herein, we report the first confirmed case of iatrogenic pericallosal artery aneurysm caused by an arterial wall injury during the endovascular treatment of another aneurysm.

A 50-year-old woman with ruptured anterior communicating artery aneurysm was initially treated with balloon-assisted coiling. During the procedure the tip of a microwire inserted into balloon catheter placed in the pericallosal artery caused a local injury of the inner layer of the vessel wall and vasoconstriction, without bleeding, dissection, or flow disturbances visible in digital subtraction angiography (DSA). Control examination revealed dissecting peri­callosal aneurysm. After standard dual-antiplatelet oral preparation, stent-assisted coiling of the pericallosal artery aneurysm was performed with residual contrast filling of the base of the aneurysm sac in control angiography (RROC III). After 6 months the control DSA examination showed entirely cured pericallosal aneurysm (RROC I) and reconstruction of the parent artery.

Successful endovascular treatment of an iatrogenic pericallosal aneurysm was previously reported, and this method seems to be the first-choice treatment. In our case, endovascular stent-assisted coiling also allowed for safe exclusion from circulation of pericallosal dissecting aneurysm, and the implanted stent caused reconstruction of the parent artery, restoring the normal lumen diameter. The second endovascular treatment option considered was implantation of a flow-diverted stent into the pericallosal artery.

stent-assisted coiling, iatrogenic cerebral aneurysm, pericallosal artery aneurysm

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