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Idiopathic spinal cord herniation with duplicated dura mater and dorsal subarachnoid septum. Report of a case and review of the literature

Norio Yamamoto, Shinsuke Katoh, Kousaku Higashino and Koichi Sairyo
International Journal of Spine Surgery January 2014, 8 29; DOI: https://doi.org/10.14444/1029

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Figures

  • Fig. 1
    Fig. 1

    Axial T1, T2-weighted MRI (left, center) shows significant right ventral shift of the spinal cord and a dorsal midline subarachnoid septum at T5–T6 disc level. The midline septum is observed only at this level. Sagittal T2-weighted MRI (right) shows ventral displacement of the spinal cord at T5–T6 disc level. Focal ventral kinking and adhesion of the spinal cord is apparent with an enlarged dorsal subarachnoid space.

  • Fig. 2
    Fig. 2

    Axial CT myelography at the same level as the MRI axial image (Figure 1) shows no pooling of contrast medium ventrally to the spinal cord, an uninterrupted flow of contrast material and no filling defect.

  • Fig. 3
    Fig. 3

    Intraoperative photographs. The upper photograph shows the dorsal subarachnoid septum (arrows). Right side is cranial. The lower photograph indicates the vessels in the septum (arrows).

  • Fig. 4
    Fig. 4

    Axial T1, T2-weighted MRI (left, center), sagittal T2-weighted MRI (right). The focal mildly high T2 intensity in the cord (arrows) was believed to be due to regional edema, gliosis or postoperative effects.

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Idiopathic spinal cord herniation with duplicated dura mater and dorsal subarachnoid septum. Report of a case and review of the literature
Norio Yamamoto, Shinsuke Katoh, Kousaku Higashino, Koichi Sairyo
International Journal of Spine Surgery Jan 2014, 8 29; DOI: 10.14444/1029
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