髄液漏で発症した蝶形骨洞脳瘤の1手術例

A Case Report of Sphenoidal Encephalocele Presenting with Cerebral Spinal Fluid Rhinorrhea

　Ⅰ．はじめに

頭蓋底に発生する脳瘤は，出生35,000に対して1の発生率と報告されている稀な疾患である²¹⁾．今回われわれは，髄液漏で発症した蝶形骨洞脳瘤の1手術例を経験したので若干の文献的考察を加えて報告する．

　Sphenoidal encephalocele is a rare congenital anomaly. We report a case of sphenoidal encephalocele presenting with cerebral spinal fluid rhinorrhea. A 53-years-old man suffered recurrent fever and rhinorrhea. Computed tomography demonstrated a low density area extending from the left middle cranial fossa into the left sphenoidal sinus. Bone defect was identified in the medial surface of the left middle cranial fossa. Magnetic resonance imaging with contrast medium demonstrated peripheral enhancement of the lesion. We diagnosed the lesion as sphenoidal encephalocele. Surgical repair and amputation of the encaphalocele was performed. Sphenoidal encaphalocele should be considered as a possible diagnosis for recurrent fever and rhinorrhea.