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Limbus vertebra

Limbus vertebra is a well-corticated osseous density, usually of the anterosuperior vertebral body corner, that occurs secondary to herniation of the nucleus pulposus through the the vertebral body endplate beneath the ring apophysis. These are closely related to Schmörl nodes and should not be confused with limbus fractures or infection.

Radiographic features

Limbus vertebrae should be well corticated and occupy the expected location of a normal vertebral body corner, with a smooth and corticated vertebral margin subjacently.

A limbus vertebra of the anterosuperior corner of a single vertebral body in the mid lumbar spine is the most common presentation. The inferior and posterior margin, and other regions, are less frequently seen. 

Differential diagnosis

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