脊髄脂肪腫に合併した水髄症

Hydromyelia Associated with Spinal Lipoma

　経験した乳児脊髄脂肪腫の44症例のうち，当センター開設後の36症例において円錐繋留解除術の前後MR画像変化を検討したところ25症例（69.4％）に水髄症がみられ，そのうち終室形態のものが9症例を占めていた。水髄症の形態変化は多様性を示したが，繋留解除後に縮小をみたもの9例，いったん増大後縮小をみたもの8例で両者の合計は17症例（68.0％）であった。しかし追跡過程で増大傾向を示したままのものが5例，水髄症の形態には変化のないもの3例が存在した。

We studied morphological changes of hydromyelia complicated with spinal lipoma of infants who were untethered.

Since the MRI was introduced, early detection of spinal lipoma with lumbosacral skin abnormalities has become possible. We have experienced 44 surgi-cal cases of spinal lipoma. Out of 36 such cases, 25 (69.4%) had hydromyelia, and hydromyelia of 9 patients was found to be of the terminal ventricle type. As many as 36% of spinal lipoma patients with hydromyelia concurrently had terminal-type hydromyelia, which was considered to fall under a specific category of congenital hydromyelia.