Spontaneous Regression of Herniated Lumbar Disc with New Disc Protrusion in the Adjacent Level

Figure 2

(a) A huge extruded disc herniation that migrated caudally (white arrow) at L4-5 level on T2 weighted sagittal lumbar MR images. (b) Axial view of the same disc, extruded disc occupying nearly half of the spinal canal. (c and d) The extruded disc has disappeared completely (white arrows) in sagittal and axial MR images after three years; the height of the disc space slightly decreased at L4-5 level and there was no sign of compression. The protrusion of L5-S1 disc (arrow head) that will be obvious in the left sagittal images.

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