L4-L5 interval

What does "L4-L5 interval" 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 "L4-L5 interval" refers to the space between the fourth and fifth lumbar vertebrae in the lower back. These are the two lowest bones in the spinal column before it connects with the sacrum, which is part of the pelvis. This area is often mentioned in medical contexts because it's a common site for back pain and spinal disc issues. The term "interval" is used to describe the space where the nerves and spinal disc are located.

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