Lumbar disc extrusion

Discussion:

This study shows two features of extruded and sequestrated disc material. The first is the toothpaste sign of nucleus pulposus being squeezed out from the central disc into the epidural space.  The second is the slightly different T2 signal of the annulus (lower) and the extruded/sequestrated nucleus having a slightly higher signal intensity. This is seen on both axial and coronal sequences.

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