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Updated: May 26, 2026
05:52
Myocardial Infarction by Percutaneous Embolization Coil Deployment in a Swine Model
Published on: November 4, 2021
Delayed Steroid-Responsive Perianeurysmal Inflammation Mimicking Infectious Meningitis Seven Years after Coil
Tatsuya Ueno1, Maki Miura1, Ko Hiyama1
1Department of Neurology, Aomori Prefectural Central Hospital, Japan.
Internal Medicine (Tokyo, Japan)
|May 24, 2026
Summary
Delayed inflammation after coil embolization for brain aneurysms is rare. A patient experienced meningitis-like symptoms years later, resolved with steroids, highlighting a unique inflammatory complication.
Area of Science:
- Neurology
- Interventional Neuroradiology
Background:
- Delayed inflammatory complications following endovascular coil embolization of intracranial aneurysms are uncommon.
- These rare events can manifest years after initial treatment and angiographic cure.
Purpose of the Study:
- To describe a rare case of delayed inflammatory complication after coil embolization of an intracranial aneurysm.
- To highlight the diagnostic challenges and successful management of this unusual presentation.
Main Methods:
- Case report of a 61-year-old patient who underwent coil embolization for a ruptured internal carotid-posterior communicating artery aneurysm.
- Detailed analysis including cerebrospinal fluid examination, extensive infectious and autoimmune workup, and magnetic resonance imaging.
- Treatment with corticosteroids and monitoring of clinical and radiological outcomes.
Main Results:
- The patient developed recurrent transient neurological symptoms seven years post-embolization.
- Cerebrospinal fluid analysis suggested infectious meningitis (neutrophilic pleocytosis, hypoglycorrhachia), but infection and autoimmune tests were negative.
- Magnetic resonance imaging showed perianeurysmal edema and intra-aneurysmal enhancement; symptoms resolved rapidly with corticosteroid therapy.
Conclusions:
- This case illustrates a rare delayed inflammatory complication mimicking infectious meningitis after intracranial aneurysm coil embolization.
- Corticosteroid therapy can be effective in managing such inflammatory sequelae.
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