Right L4-S1 posterolateral fusion with local bone graft

What does "Right L4-S1 posterolateral fusion with local bone graft" 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 with local bone graft" is a type of back surgery. The surgeon joins together certain bones in the lower spine, specifically the fourth lumbar vertebra to the first sacral vertebra. This is done to stabilize the spine and reduce pain or correct a deformity. The term "local bone graft" means that the surgeon uses bone from the patient's own body to help the spinal bones fuse together.

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