Scotty Dog sign

The scotty dog sign refers to the normal appearance of the lumbar spine when seen on oblique radiographic projection. On oblique views, the posterior elements of vertebra form the figure of a Scotty dog with:

  • Transverse process → nose
  • pedicle → eye
  • Inferior articular facet → front leg
  • superior articular facet → ear
  • pars interarticularis (the portion of the lamina that lies between the facets) → neck of the dog.

If spondylolysis is present, the pars interarticular is, 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 (or decapitation for those with a bloodier imagination)

Hope that mnemonic helped. Got a better mnemonic for the same? Let us know in the comments below.
Also check out these medical mnemonics

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