小児の髄膜腫:5例の臨床的検討

The clinical analysis of pediatric meningioma:5 cases

I．はじめに

　小児（15歳以下）の髄膜腫は成人に比して比較的稀な腫瘍であり，その頻度は小児の脳腫瘍中，0.4％から3.6％であり^{4,11-13,15,21）}，成人の髄膜腫とは臨床的特徴が異なる．今回われわれは5例の小児髄膜腫を経験した．その臨床的特徴を検討し，文献的考察を加えて報告する．

Five cases of pediatric meningioma were reported with special emphasis on the clinical features.

These cases consisted of three boys and two girls be-tween eight and fifteen years old. Two were falx meningioma, two were suprasellar, and one was petro-clival. One falx meningioma was associated with Neu-rofibromatosis Ⅱ, and a suprasellar case had no dural attachment, but had cystic component after recurrence. Histologically, there were three meningothelial, one transitional, and one fibrous meningioma. No malignant meningioma was found among any of the cases.

Two cases received postoperative irradiation and had no recurrence. A falx meningioma with Neurofibroma-tosis Ⅱ and a suprasellar with no dural attachment had evidence of recurrence. The latter suffered from severe neurological deficits after reoperation. It was suggested that irradiation against residual tumor should be consi-dered. However, total removal should be carried out in pediatric cases of meningioma.

The authors concluded that our cases had features intermediate between adult meningiomas and pediatric meningiomas because the majority of cases were senior children.