The Specific Sagittal Magnetic Resonance Imaging of Intradural Extra-Arachnoid Lumbar Disc Herniation. (16th February 2012)

• Record Type: Journal Article
• Authors: Sasaji, Tatsuro; Horaguchi, Kiyoshi; Yamada, Noboru; Iwai, Kazuo
• Other Names: Wang Jeffrey C. Academic Editor.
• Is Part Of: Case reports in medicine. Volume 2012(2012)
• Publication Date: 2012-02-16
• Subjects: Medicine -- Periodicals; Medicine -- Periodicals; Medicine; Case Reports; Periodicals; 610
• DOI: 10.1155/2012/383451
• Languages: English
• ISSNs: 1687-9627

Abstract

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.