A fracture of the pars interarticularis of the L5 vertebral body is seen, with resultant grade 1 anterolisthesis of the L5 on S1 vertebra and reduced L5-S1 intervertebral disc space.
Although the Scottie Dog sign is (strictly speaking) reserved for oblique radiographic projection, it is clearly seen here on the lateral radiographs, with a defect at the neck of the Scottie Dog which is the portion of the lamina between the superior and inferior articular facets.