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The specific sagittal magnetic resonance imaging of intradural extra-arachnoid lumbar disc herniation.

Sasaji T, Horaguchi K, Yamada N, Iwai K - Case Rep Med (2012)

Bottom Line: Few MRI findings have been reported.We reviewed the preoperative MRI findings.We speculated that the two lines comprised the dura and arachnoid and that a disc herniation existed between them.

View Article: PubMed Central - PubMed

Affiliation: Department of Orthopedic Surgery, Fukushima Rosai Hospital, 3-Numajiri, Tsuzura-machi, Uchigo, Iwaki 973-8403, Japan.

ABSTRACT
Intradural extra-arachnoid lumbar disc herniation is a rare disease. Few MRI findings have been reported. We experienced an intradural extra-arachnoid lumbar disc herniation. We reviewed the preoperative MRI findings. Lumbar spine T2-weighted sagittal MRI showed that one line of the ventral dura was divided into two by a disc herniation. We speculated that the two lines comprised the dura and arachnoid and that a disc herniation existed between them. We believe that division of the ventral dural line on T2-weighted sagittal images is a characteristic finding of intradural extra-arachnoid lumbar disc herniation. The division of ventral dural line seemed to be a "Y," and, thus, we called it the "Y sign." The "Y sign" may be useful for diagnosing intradural extra-arachnoid lumbar disc herniation.

No MeSH data available.


Related in: MedlinePlus

Preoperative MRI of the lumbar spine: (a) sagittal plane T2-weighted image. (b) Axial plane T2-weighted image. The ventral dural line was divided such that disc herniation existed between the two lines (black arrow) (a). The border of cauda equina and disc herniation was unclear (b).
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fig1: Preoperative MRI of the lumbar spine: (a) sagittal plane T2-weighted image. (b) Axial plane T2-weighted image. The ventral dural line was divided such that disc herniation existed between the two lines (black arrow) (a). The border of cauda equina and disc herniation was unclear (b).

Mentions: Lumbar spine MRI showed a mass compressing the dura that caudally migrated at the L2-L3 level on T2-weighted sagittal image (Figure 1(a)). The mass continued to the disc and was assumed to be a lumbar disc herniation. The ventral dural line was divided into two near the disc herniation such that the herniation existed between these lines. The cauda equina was compressed by the disc herniation on T2-weighted axial images (Figure 1(b)). Intradural extra-arachnoid disc herniation was diagnosed.


The specific sagittal magnetic resonance imaging of intradural extra-arachnoid lumbar disc herniation.

Sasaji T, Horaguchi K, Yamada N, Iwai K - Case Rep Med (2012)

Preoperative MRI of the lumbar spine: (a) sagittal plane T2-weighted image. (b) Axial plane T2-weighted image. The ventral dural line was divided such that disc herniation existed between the two lines (black arrow) (a). The border of cauda equina and disc herniation was unclear (b).
© Copyright Policy - open-access
Related In: Results  -  Collection

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getmorefigures.php?uid=PMC3295378&req=5

fig1: Preoperative MRI of the lumbar spine: (a) sagittal plane T2-weighted image. (b) Axial plane T2-weighted image. The ventral dural line was divided such that disc herniation existed between the two lines (black arrow) (a). The border of cauda equina and disc herniation was unclear (b).
Mentions: Lumbar spine MRI showed a mass compressing the dura that caudally migrated at the L2-L3 level on T2-weighted sagittal image (Figure 1(a)). The mass continued to the disc and was assumed to be a lumbar disc herniation. The ventral dural line was divided into two near the disc herniation such that the herniation existed between these lines. The cauda equina was compressed by the disc herniation on T2-weighted axial images (Figure 1(b)). Intradural extra-arachnoid disc herniation was diagnosed.

Bottom Line: Few MRI findings have been reported.We reviewed the preoperative MRI findings.We speculated that the two lines comprised the dura and arachnoid and that a disc herniation existed between them.

View Article: PubMed Central - PubMed

Affiliation: Department of Orthopedic Surgery, Fukushima Rosai Hospital, 3-Numajiri, Tsuzura-machi, Uchigo, Iwaki 973-8403, Japan.

ABSTRACT
Intradural extra-arachnoid lumbar disc herniation is a rare disease. Few MRI findings have been reported. We experienced an intradural extra-arachnoid lumbar disc herniation. We reviewed the preoperative MRI findings. Lumbar spine T2-weighted sagittal MRI showed that one line of the ventral dura was divided into two by a disc herniation. We speculated that the two lines comprised the dura and arachnoid and that a disc herniation existed between them. We believe that division of the ventral dural line on T2-weighted sagittal images is a characteristic finding of intradural extra-arachnoid lumbar disc herniation. The division of ventral dural line seemed to be a "Y," and, thus, we called it the "Y sign." The "Y sign" may be useful for diagnosing intradural extra-arachnoid lumbar disc herniation.

No MeSH data available.


Related in: MedlinePlus