Posted 9/29/2012 5:40 PM (GMT -5)
Marika,
I looked it up and from what I can figure out - without spending hours doing research - it's something that could be an issue, especially later on down the road. Something to definitely follow up on.
This is about the best description I've found:
The thecal sac is the membrane (called dura mater) that covers the spinal cord. It usually holds the cerebrospinal fluid that surrounds the spinal cord. When there is spinal canal narrowing or a herniated spinal disc that is bulging into the spinal canal, the bone or disc may impinge on the spinal cord. Usually, when a radiologist says "mild" narrowing of the thecal sac, this means that something is just indenting it.
I hope this helps some!