What does "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.
"L5" refers to the fifth lumbar vertebra, which is one of the bones in the lower part of the spine. The lumbar region of the spine is located in the lower back area, and it consists of five vertebrae labeled as L1 to L5. The L5 vertebra is the lowest one in this region, located just above the sacrum, which is the triangular bone at the base of the spine.
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