Low Back Pain - L3-4 Lumbar Disc (Disk) Herniation. This full color medical exhibit portrays a dual level intervertebral disc injury. The first illustration provides an overall orientation of the spinal column with the area of injury indicated by a box. Next to this is an enlarged sagittal view of the lumbar spine from L2-S1. Disc herniations are shown at the the L3-4 and L4-5 levels. Both herniations protrude into the spinal canal and compress the cauda equina  (cauda equina syndrome).
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