Right L4-S1 posterolateral fusion

What does "Right L4-S1 posterolateral fusion" 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

"Right L4-S1 posterolateral fusion" refers to a surgical procedure performed on the lower back. The aim of this operation is to join together, or fuse, certain bones in the spine to reduce pain and improve stability. The specific bones involved are the fourth lumbar vertebra (L4) down to the first sacral vertebra (S1). The term "posterolateral" indicates that the surgery is done from the back and side.

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