Image 1: Sagittal T2 weighted image of Lumbosacral spine reveals a
Grade 1 antrolisthesis of L5 on S1 vertebral bodies.
Image 2: Axial proton-density weighted image at L5 level demonstrates
elongation of the spinal canal in anteroposterior direction.
Image 3: Sagittal T1 weighted image shows the bony discontinuity of
the pars interarticularis of L5 vertebra. The L5/S1 intervertebral foramen
has a horizontal orientation and bilobed configuration. (T. Lai)
Key words: mri lumbar degenerative
Bilateral spondylolysis with
grade 1 spondylolisthesis at L5/S1.