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Spontaneous resolution of idiopathic lumbar subdural hygroma on CT myelography and lumbar spine MRI
  1. Chong K Yi,
  2. Timothy J Biega,
  3. Ricardo M Burgos
  1. Department of Radiology, Tripler Army Medical Center, Honolulu, Hawaii, USA
  1. Correspondence to Dr Chong K Yi,{at}

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A 23-year-old man with a history of limited right ankle dorsiflexion presented to the MRI suite for a routine lumbar spine MRI. The patient denied history of prior spinal trauma or systemic symptoms. Aside from mild right ankle pain, physical and neurological examinations were unremarkable.

Lumbar spine MRI revealed subdural fluid collections at T12-S1 levels (figure 1A, B). Follow-up enhanced brain MRI (not shown) and cervicothoracic spine MRI (not shown) in the same week were both unremarkable, with no evidence of intracranial hypotension or extra-arachnoid fluid collections. Two weeks later, CT myelogram (figure …

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