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Discal cysts

Discal cysts. Kathryn Phillips. Discal cysts. Epidural Ventrolateral May communicate with the disc C oncurrent disc disease with herniation or bulging. Tightly adhered to anulus fibrosis Occasionally have mild bone erosion Occasionally have hemorrhage into cyst. MRI features.

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Discal cysts

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  1. Discal cysts Kathryn Phillips

  2. Discal cysts • Epidural • Ventrolateral • May communicate with the disc • Concurrent disc disease with herniation or bulging. • Tightly adhered to anulus fibrosis • Occasionally have mild bone erosion • Occasionally have hemorrhage into cyst

  3. MRI features T1 – equivalent to fluid T2 - Hyperintense

  4. Toby 134729 Normal spinal canal T2 hyperintense oval structure causing cord compression

  5. MR features • Discal cyst in a man • Cyst is isointense to CSF • Cyst has a thick wall that contrast enhances

  6. Imaging CT diskography: communication between disc and cyst is demonstrated by injecting contrast into the disc space.

  7. Differential diagnoses • Synovial cyst – dorsolateral to or inseparable from facet joints. • Perineural cysts – usually close to nerve root, and are thin walled. • Arachnoid cysts – younger patients, not associated with herniated disc and do not contrast enhance.

  8. References • Konar M, Lang J, Fluhmann, Forterre. MRI appearance of ventral intraspinal cysts associiated with intervertebral disc in dogs. Abstracts from the annual conference of the European association of veterinary diagnostic imaging. 2008. Vet rad us. 49;2:196-219. • Lee HK, Lee DH, Choi, CG, Kim SJ, Suh DC, Kahng, Roh, Rhim. Discal cyst of the lumbar spine: MR imaging features. 2006. Clinical imaging 326-330. • Kono K, Nakamura H, Inoue Y, Okamura T, Shakudo M, and Yamada. IntraspinalExtradural Cysts Communicating with adjacent Herniated Disks: imaging characteristics and possible pathogenesis. 1999 Am j neuroradiol 20:1373-1377

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