L5-S1 interspace

What does "L5-S1 interspace" mean in a report or doctor's letter? In our medical dictionary, you will find a patient-friendly explanation of the meaning of this medical term.

Explanation

The "L5-S1 interspace" refers to a specific area in the lower back. It's the space between the last bone of the spine (called L5) and the first bone of the sacrum (called S1), which is the triangular bone at the base of the spine. This area is often mentioned in the context of back pain or spinal surgery, as it's a common site for disc herniation and other spinal issues.

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