- Arachnoid cyst (shown above): Nonenhancing loculated collection that follows cerebrospinal fluid signal. Can be intradural or extradural.
- Facet synovial cyst: Associated with facet arthropathy and located along the posterolateral aspect of spinal canal adjacent to the facet joint.
- Pseudomeningocele: Look for evidence of prior trauma (e.g., surgery).
- Abscess:
- Epidural hematoma: Look for blooming on T2* images.
- Idiopathic spinal cord herniation: Herniation of the cord through a ventral dural defect. Ventral deviation of the cord can mimic a posterior epidural collection. May be associated with an arachnoid cyst due to adhesions.
Monday, May 9, 2011
Spinal Epidural Fluid Collection
Differential considerations for an epidural fluid collection in the spine:
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