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With degenerative disc disease, disc bulging occurs with flattening out of the disc and subsequent spreading out. Typical bulging presents symmetrical, but sometimes a protrusion will develop that is eccentric, ie., asymmetrical bulging. An eccentric protrusion will be to one side, in this case left, sometimes causing neurologic symptoms on that side, sometimes not. A protrusion is less than 3 mm, whereas a herniation exceeds 3 mm.
Wiki User
∙ 14y ago
Wiki User
∙ 11y agoThere are 5 Lumbar 'levels', labeled L1 to L5. These are lower back disks.
Each spinal level has a spongey material between the spinal vertebra (the spinal bones). Because it is 'between', they give 2 'levels', such as L4-L5. When the spongey material 'leaks' it can create a disk bulge, or if it 'breaks open' it can create a total herniation. A disk bulge can be (typically) posterior, meaning to the back. Or lateral, which means to the side, right or left. Asymmetrical means, loosely, a non-even shape.
So your question can be rephrased as a non-even disk material bulge to the left at Lumbar 4 - Lumbar 5.
NOTE: Many people have disk bulges without pain, though other people do have pain.
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