Bilateral L5 pars interarticularis defects in keeping spondylolysis with anterior displacement of the L5 vertebral body on the S1 in keeping with spondylolisthesis grade I according to the Meyerding classification system for grading degree of spondylolisthesis.
Narrowing of the L5-S1 disc space with a low signal on T1, high signal on T2 and STIR with enhancement of the vertebral end-plates (bone marrow oedema). Thickening with enhancement of the anterior epidural and prevertebral spaces mainly with small abscesses formation.