松果体部出血による水頭症で発症したpineoblastomaの1例

A Case of Pineoblastoma Primary Presenting a Pineal Hemorrhage Causing Obstructive Hydrocephalus

Ⅰ．はじめに

　頭蓋内出血の原因は多くは血管病変によるが，腫瘍からの出血も鑑別として重要である^1）．今回われわれは松果体出血による閉塞性水頭症で発症した松果体芽腫症例を経験したので，文献的考察を加え報告する．

A 9-year-old female suddenly developed headache and nausea. Computed tomography (CT) revealed pineal mass lesion and obstructive hydrocephalus. One week after the onset, hydrocephalus spontaneously resolved. Magnetic resonance imaging (MRI) revealed that the mass was a subacute hematoma and that hydrocephalus had improved. Se-quential MRI 4 months later revealed an enhanced lesion in the pineal region. Total removal of the tumor by the oc-cipital transtentorial approach established the histopathological diagnosis of pineoblastoma.