What Does Epidural Lipomatosis Mean on a Spine MRI?

Short answer: epidural lipomatosis means extra fatty tissue is described in the spinal canal area. It may be incidental, or it may contribute to crowding around nerves when narrowing is significant.

What the wording usually describes

Reports may mention epidural lipomatosis with canal stenosis, degenerative changes, or nerve crowding. The term does not automatically explain pain; clinicians compare the MRI level with walking tolerance, leg symptoms, neurologic exam findings, medication history, and other risk factors.

Details that make the finding more or less important

whether the report calls the narrowing mild, moderate, or severe
which spinal levels are involved
whether symptoms worsen with standing or walking and improve with sitting
whether leg numbness, weakness, balance change, or bowel/bladder symptoms are present
whether other findings such as disc bulge, facet arthropathy, or ligament thickening are also present

How to discuss it at a pain visit

Ask whether the finding is likely incidental or part of the reason nerves may be crowded. Urgent neurologic symptoms should be reviewed promptly rather than handled as a routine imaging question.

Related PSG resources: spinal stenosis, lower back pain, and sciatica.

Sources include NCBI StatPearls - Spinal Epidural Lipomatosis, RadiologyInfo - MRI Spine, NINDS - Low Back Pain Fact Sheet. This article is educational and cannot diagnose the cause of pain from an imaging phrase alone.

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