Spinal Cord Vascular DiseasesAnterior Spinal Artery SyndromeInfarctionSuperior Mesenteric Artery SyndromeDuodenostomySpinal CordSpinal FusionDuodenal ObstructionScoliosisJejunostomyVertebral ArteryEnterostomySyndromeSpineArteriesOrthopedic Fixation DevicesKyphosisThoracic VertebraeHypesthesiaAngiography