Endoscopic Endonasal Surgery for Frontal Skull Base Meningoencephalocele in an Infant

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  • Hohchi Nobusuke
    Department of Otorhinolaryngology-Head and Neck Surgery, School of Medicine, University of Occupational and Environmental Health
  • Takenaga Fumiko
    Department of Otorhinolaryngology-Head and Neck Surgery, School of Medicine, University of Occupational and Environmental Health
  • Takahashi Risa
    Department of Otorhinolaryngology-Head and Neck Surgery, School of Medicine, University of Occupational and Environmental Health
  • Hashida Koichi
    Department of Otorhinolaryngology-Head and Neck Surgery, School of Medicine, University of Occupational and Environmental Health
  • Takahashi Mayu
    Department of Neurosurgery, School of Medicine, University of Occupational and Environmental Health
  • Suzuki Hideaki
    Department of Otorhinolaryngology-Head and Neck Surgery, School of Medicine, University of Occupational and Environmental Health

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  • 経鼻内視鏡下切除術を施行した幼児髄膜脳瘤症例

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Meningoencephalocele is a protrusion of meninges including herniated encephalon through a congenital or acquired cranial bone defect. We herein report a rare case of a frontal skull base meningoencephalocele, which was successfully resected via an endoscopic endonasal approach. A 1-year-old girl presented with a dark-reddish mass in her right nasal cavity. She had no history of meningitis. Computed tomography and magnetic resonance imaging revealed a small bone defect of the frontal skull base and a pedunculated cystic mass arising from the bone defect extending into the right anterior nasal cavity. Under a clinical diagnosis of frontal skull base meningoencephalocele, endoscopic endonasal resection was performed with the aid of endoloop ligation. The defect of the frontal skull base was reconstructed using a posteriorly based septal mucosal flap. Her clinical course has been uneventful without cerebrospinal fluid leakage or signs of meningitis for 12 months postoperatively. We stress that endoscopic endonasal surgery combined with an endoloop ligation technique is a minimally invasive and effective procedure for resecting such skull base lesions, even in a small nasal cavity such as that of an infant.

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