What does it mean when you have sacralization or lumbarization of the vertebrae? Don't be alarmed. There's nothing wrong with your spine; it's just the way your body grew. We have five lumbar vertebrae. There are five sacral vertebrae, but they are fused naturally. Sometimes L5 may merge to S1 (sacralization). Sometimes S1 is not fused with the other sacral levels (lumbarization). Again, nothing wrong with you. Some sacralized cases may become symptomatic, but there's nothing to be alarmed about.

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