What does "Interspace of L4-L5" 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.
The "interspace of L4-L5" refers to the area between the fourth and fifth lumbar vertebrae in the spine. These are located in the lower back, just above the tailbone. This space is important because it contains a disc, which acts like a cushion to absorb shock and prevent the bones from rubbing against each other. Any issues in this area, like a herniated disc, can cause lower back pain.
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