脊髄硬膜外髄膜腫

Spinal Extradural Meningionia

Ⅰ．はじめに

　髄膜腫のなかで，脊椎管内に発生するものは少なく，われわれの教室の482例の髄膜腫のうち，8例（1.7％）に過ぎない．この脊椎管内髄膜腫（一般には脊髄々嘆腫といわれる）のうち，硬膜内には発育せず，完全に硬膜外のものは，さらに，極めて稀である．これらの脊髄硬膜外髄膜腫は，頻度の稀なことの他に，その発生が興味深い．われわれは現在まで2例の原発性脊髄硬膜外髄膜腫を経験したのでここに報告し，若干の文献的考察を加える．

Spinal extradural meningiomas are rare. The authors reported two such cases.

The first case was 27-year-old woman, who sustainedlumbago, paraparesis of legs and sensory disturbances up to the level of T9. Myelography revealed a complete block between T6 and T8 vertebra. After the laminectomy, the extradural en plaque tumor covering the posterior surface of the dura mater was discovered extending between the lower edge of T6 and the lower edge of T8 vertebra.