Fig. 4

Illustrates a dog with lower back pain and a possible source of pain identified on imaging. Dorsal reconstruction, computed tomography (CT) in bone algorithm, of a Brittany, female, 3.5 years old, flexed position with lumbosacral transitional vertebra (LTV) type 3 [8], showing a right-sided complex connection between the ilium, transverse process of the sacrum (white arrows) and transverse process of the LTV segment (orange arrow), the hypoattenuating thin line in the sacral transverse process is representing a fissure line (blue arrow). The left transverse process of the LTV segment has characteristics of an anatomical normal lumbar transverse process (not shown). Asymmetry of the first sacral foramina, slight sclerosis of the first right sacral foramina (red arrow), in addition to at the base of the right sacral transverse process