Multiple Azygos Anterior Cerebral Artery Aneurysms with Concomitant Dysplasia of Corpus Callosum, a Lipoma and a Falx Meningioma : A Case Report

  • Omama Shinichi
    Department of Neurosurgery, Iwate Medical University, School of Medicine
  • Suzuki Michiyasu
    Department of Neurosurgery, Iwate Medical University, School of Medicine
  • Sato Naoya
    Department of Neurosurgery, Iwate Medical University, School of Medicine
  • Otawara Yasunari
    Department of Neurosurgery, Iwate Medical University, School of Medicine
  • Kashimura Hiroshi
    Department of Neurosurgery, Iwate Medical University, School of Medicine
  • Doi Mamoru
    Department of Neurosurgery, Iwate Medical University, School of Medicine
  • Miura Kazuyuki
    Department of Neurosurgery, Iwate Medical University, School of Medicine
  • Kuroda Kiyoshi
    Department of Neurosurgery, Iwate Medical University, School of Medicine
  • Ogawa Akira
    Department of Neurosurgery, Iwate Medical University, School of Medicine

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Other Title
  • くも膜下出血で発症し脳梁低形成, 脳梁脂肪腫, 大脳鎌髄膜腫の合併が認められた多発性azygos anterior cerebral artery aneurysmの1例

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We experienced a case with a ruptured aneurysm at the origin of azygos anterior cerebral artery(azygos ACA), and multiple aneurysms arising from the azygos trunk, which were not located at the vessel branching site. This case was also associated with hypoplasia of corpus callosum and a lipoma in the same part. This dysgenetic lesion, assumed to have formed in the patient's natural development suggests that aneurysms on the azygos ACA trunk may not necessarily result from the usual causal factors such as defect or hemodynamic stress, but instead develop due to the influenece of such development factors as dysgenesis of corpus callosum or the malnutrition of the vessel wall due to the presence of a lipoma.

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