Scottie dog appearance on oblique spine radiograph

Case contributed by Mohammad Taghi Niknejad
Diagnosis not applicable
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On oblique views of the lumbar spine, the posterior elements form the figure of a Scottie dog, with the transverse process being the nose, the pedicle forming the eye, the inferior articular facet being the front leg, the superior articular facet representing the ear, and the pars interarticularis (the portion of the lamina that lies between the facets) equivalent to the neck of the dog.

Case Discussion

This case demonstrates Scottie dog appearance in a normal oblique lumbar radiograph.

If a spondylolysis is present, the pars interarticularis, or the neck of the dog, will have a defect or break. It often looks as if the dog has a collar around the neck.

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