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神経線維腫症には,しばしば脊柱変形を伴い整形外科的治療を要する.なかでも,急速に変形が進行し,後弯変形を伴うことの多いdystrophic typeでは,前方後方固定術を行っても術後の偽関節発生率が高く治療に難渋する.症例は12歳の女性で,dystrophic typeの角状後側弯症例(Cobb角91°の側弯,62°の後弯)であり,特に神経学的所見は認めなかった.この症例に対し,後方単一進入による3次元的楔状骨切り術を施行した.術後は側弯が26°,後弯が16°に改善し,術後4カ月で矯正損失なく骨癒合を認めた.本症例では椎体の回旋が著明であり,後方進入のみでも肋骨頭を切除し椎体側方から前方の操作が可能であった.本術式では頂椎部を3次元的に骨切りし,脊髄を直視下に見ながら矯正操作を行うことで,脊髄に安全かつ十分な矯正,固定を行うことが可能であった.
A case was 12-year-old girl with dystrophic curve included an angular kyphoscoliosis. The scoliosis angle measured 91° and the kyphosis angle measured 62°. In this case, we corrected the kyphoscoliosis by 3-dimensional closing wedge osteotomy via a posterior approach alone, and the postoperative curves were 26° (scoliosis) and 16° (kyphosis). Four months later the fusion appeared to be solid and there was no correction loss. Because of severe apical rotation on the convex side, so we could treat anterior column through the extra-pleural space following to resect rib's heads by single posterior approach. Satisfactory correction and stabilization was safely performed by 3-dimensional closing wedge osteotomy with a direct visualization of spinal cord.
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