Levels of L5-S1

What does "Levels of L5-S1" 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

"Levels of L5-S1" refers to a specific area in the lower part of the spine. The spine is made up of individual bones called vertebrae, which are stacked on top of each other. L5 represents the fifth vertebrae in the lumbar, or lower, region of the spine. S1 represents the first vertebrae in the sacral, or bottom, region of the spine. So, "levels of L5-S1" is talking about the space between these two vertebrae.

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