Conversation: The conversation between human and AI assistant.
[|Human|] Hi I have recently had an MRI and the results are: L5/S1 narrows with fibro fatty endplate reactive changed, an annular displacement posteriorly to the left and some posterior displacement of the S1 nerve root sleeve but no compression would appreciate your explanation. thank you
[|AI|]  Hi, Thanks for writing in. There are small bones that make up the spine. In the lumbar region there are 5 bones called vertebrae numbered from L 1 to L 5. After L 5 there is S 1. S 1 to S 5 are sacral segments and fused together. Between any two bones till the level of L 5 - S 1 there are small discs which are cushioned like structures to allow movement in all directions. The discs are between the ends of two bone called end plates and fills the space between the end plates. There are small foramina between any two bones at the disc level through which nerve roots originating in the spinal cord pass through. In your case the opposing end plates of L 5 and S 1 vertebrae have developed mild age related changes. The disc at this level is also showing an annular displacement to the left side which is also seen to displace the nerve root. However, the nerve root is not under compression. Your imaging findings indicate a mild form of lower back disc problem and can be treated with pain relief medications and physiotherapy. Avoid carrying heavy object and doing heavy physical activity. Please do not worry.