Resection of a Hemangioma-like Lesion with Multiple Cysts Following Gamma Knife Surgery for Cerebral Arteriovenous Malformation: A Case Report

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  • 脳動静脈奇形に対するガンマナイフ治療後に生じた囊胞と血管腫様病変に対して摘出術を行った1例

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<p>Cyst formation as a late complication of gamma knife surgery for cerebral arteriovenous malformations (AVM) is well-known; however, angiomatous lesions are rare. We report a case in which angiomatous lesion resection was effective. The patient is a 41-year-old man who underwent gamma knife surgery for parasplenial AVM in his 20s. During follow-up, cysts appeared in the bilateral parietal lobes and repeated convulsion occurred. The patient was referred to our hospital because of prolonged loss of consciousness due to convulsions. Magnetic resonance imaging (MRI) showed an angiomatous lesion and multiple cysts with extensive cerebral edema. Cyst-peritoneal shunt was performed, but consciousness did not improve. Tumor resection was performed. The pathological diagnosis was cavernous hemangioma. Postoperatively, consciousness improved. Asymptomatic cases can be followed. However, in cases with symptomatic hemangioma lesions, prompt surgical removal should be considered.</p>

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