Flattening of the Dural sac is something that can be observed in patients who suffer from muscular atrophy of distal upper extremities. This means the Dural sac that encloses the spine is restricted and could cause many different things.
What is compression of the ventral dural sac?
to touch the spine
The dural sac covers the spine. Typical causes of dural sac impingement typically include bulging discs, herniated discs, or osteophytes. These conditions can also affect the spinal cord.
S3
Thecal sac flattening occurs when a herniated disc has into the spinal canal that it is pushing on the thecal sac. The thecal sac is the membrane of dura mater that surrounds the spinal cord and the cauda equina.
dural folds
You have a bone spur on the vertebrae that is protruding towards the front of your body and putting pressure on the sac of cerebrospinal fluid that encircles the brain and spinal cord.
Ventral means in front. Thecal sac means the sac that contain the spinal cord and cerebro spinal fluid. Effacement of the ventral thecal sac means pressure is upon the front of the sac (producing a flattening effect) most likely from a disc protrusion. Foramen means hole (where the nerve comes out of from the spinal cord). Stenosis means narrowing (usually from bony degeneration or disc herniation/protrusion/or bulge). Left foraminal stenosis means narrowing of the passageway where the nerve comes through.
Flattening of the Pons is typically associated with several neurological conditions causing autonomic dysfunction.
Un sac means a bag
un sac is a bag in French.
It means a piece of your disk has broken off completely form the rest of the disk, and it is pressing on a nerve root that branches off from your spinal cord.