The thecal sac is located within the spinal cord and contains CSF. A compression can occur when there is a herination, tramatic injury, such as a car accident. The area is filled with pain receptors which makes the compression very painful. Treatments involve chiropractic care, surgery, physical therapy, depending on the severity.
The thecal sac is a thin walled tube filled with cerebrospinal fluid that surrounds the spinal cord. The compression can come from a herniation of the sac in which fluid may be leaking into the spinal column. An MRI can detect this compression. A neurosurgeon would be able to determine this and repair the damage.
A thecal sac compression is a condition that causes symptoms of pain and weakness because it contains a large quantity of pain receptors within it. As it protects and lubricates the spinal column, it is often put at risk for compression when other spinal column injuries occur.