vertebral scalloping

Vertebral scalloping is a concavity to the posterior (or less commonly anterior) aspect of the vertebral body when viewed in a lateral projection. A small amount of concavity is normal, as is concavity of the anterior vertebral body (see vertebral body squaring).

Posterior scalloping

Causes of posterior scalloping include the following, organized by mechanism :

A useful mnemonic can be found here.

Anterior scalloping

Causes of increased anterior scalloping include: