L4-L5 interspace

What does "L4-L5 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 "L4-L5 interspace" refers to the area 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 the context of back pain, as it's a common site for disc herniation and other spinal problems. The term "interspace" simply means the space between these two specific vertebrae.

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