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 CASE REPORT
Year : 2021  |  Volume : 69  |  Issue : 3  |  Page : 744--747

Trigeminal Neuralgia from an Arteriovenous Malformation of the Trigeminal Root Entry Zone with a Flow-Related Feeding Artery Aneurysm: The Role of a Combined Endovascular and “Tailored” Surgical Treatment


Department of Neurosurgery, Sanjay Gandhi Postgraduate Institute of Medical Sciences, Rae Bareli Road, Lucknow, Uttar Pradesh, India

Correspondence Address:
Dr. Kuntal K Das
Department of Neurosurgery, Sanjay Gandhi Postgraduate Institute of Medical Sciences, Rae Bareli Road, Lucknow - 226 014, Uttar Pradesh
India
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/0028-3886.319235

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Idiopathic trigeminal neuralgia (TN) due to an embedded arteriovenous malformation (AVM) on the trigeminal root entry zone (REZ) is rare but a potentially challenging condition to manage. Herein, we report such a case with an additional unruptured aneurysm on the feeding artery and highlight the role of a multimodality approach to their management. A 50-year-old female presented with drug-resistant right-sided trigeminal neuralgia for one year. The magnetic resonance imaging (MRI) suggested a possibility of AVM, the angiographic study showed an AVM nidus with feeders from the right anterior inferior cerebellar artery (AICA) and a dilated right intrinsic pontine artery, the latter showing a flow-related aneurysm towards its brainstem end. The flow-related aneurysm, as well as the dilated intrinsic pontine artery feeder, was embolized at first. During surgery, the AVM was found embedded inside the root entry zone. Parts of the AVM and its draining vein were partially coagulated followed by microvascular decompression of the AICA loop as well as a feeder emanating from it following which the patient recovered completely. She subsequently received gamma knife surgery (GKS) for the residual AVM and remained asymptomatic after 3.5 years of GKS. AVM-related TN are rare, and the additional presence of a feeding artery aneurysm increases the management complexity. Endovascular management of the aneurysm followed by microvascular decompression (MVD) and tailored AVM coagulation represent a prompt and effective means of pain control. Subsequent GKS is necessary to obliterate the AVM nidus.






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