2018 Volume 27 Issue 1 Pages 38-44
There are few reports of delayed symptomatic complications occurring after coil embolization. A 70-year-old woman underwent coil embolization for subarachnoid hemorrhage due to a ruptured internal carotid artery-posterior communicating artery aneurysm, and was discharged without neurological deficit after 4 weeks. But one month later, she returned to our hospital because of left hemiparesis and gait disturbance. Magnetic resonance imaging (MRI) showed several enhanced lesions in the right cerebral white matter with extensive edema. We started steroid treatment. Three weeks after her second admission, her symptoms improved and the enhanced legions almost completely disappeared on MRI. We speculated these lesions were cause by hydrophilic coatings that had peeled off the various endovascular devices used during, inducing foreign body granulomas in the cerebral parenchyma. Although endovascular treatment has become quite common place, we should still pay careful coil embolization attention to in case there are delayed symptomatic complications such as these.
