Subject: mri Author: JENNIFER (08/25/2009 5:05 PM) Original Message: What does a central protrusion at T12-L1 mean with slight defacement of the thecal sac? Where would my pain be localized? I have lower back pain. Could this symptom be because of my arthriris diagnois and not the disc itself? There are no replies to this message. Send your reply: Name: To start a new paragraph, press the enter key twice before starting the new paragraph. HTML tags will not be displayed Message: Verify*  (Enter the number from the image into the box below)