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Updated: Aug 15, 2026

Ovine Lumbar Intervertebral Disc Degeneration Model Utilizing a Lateral Retroperitoneal Drill Bit Injury
Published on: May 25, 2017
Low density in the posterior portion of the lumbar disk: a new CT finding in disk herniations
Abstract:
The author describes a new computed tomographic finding associated with disk herniation--a low density in the posterior aspect of the disk, usually having a crescentic shape. This low density probably represents an area of fluid or blood accumulation within the annulus fibrosus caused by tearing of fibers in the annulus and an associated injury to the adjacent cartilage plate which opens into the spongiosa. Observation of this finding should support the diagnosis of a herniated nucleus pulposus.
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