Redundant Nerve Root Syndrome—症例報告と文献考察

Redundant Nerve Root Syndrome:a Case Report

Ⅰ．はじめに

　脊髄血管撮影が脊髄血管腫の診断にきわめて有効な検査法であることはすでに良く知られており，その普及とともに発見率あるいは手術成績が向上してきている．myelogramで蛇行した陰影欠損がみられるときまず考えられるのは血管腫であり，血管撮影によってその性状，大きさ，分布などが確かめられる^{6，7，10，13）}．

　もしmyelogramでみられた蛇行状の陰影欠損が当を得た血管撮影で造影されないとき，例外的に　adhesive arachnoiditis^2）あるいはhypertrophic interstitial neuritis of Dejerine-Sottas^1）を考慮しなければならないし血管腫自身の血栓形成という報告もある12）．

A 33-year-old fisherman was in good health until 1975 when he sustained an injury on his back and experienced an episode of lower back pain radiating to the dorsal aspect of the right leg. About 6 months later, when he was first seen in our clinic his lower back pain was still persisting, and hypesthesia hypoalgesia to pinprick were noted on both L-4, L-5 and S-1 levels. He also complained of impotence and difficulty in urination. A lumbar myelogram with Dimer-X revealed a partial stop of the contrast dye at the level of L3/L4 and also serpentlike shadow defect around the same area.