Spondylolysis & Spondylolisthesis: Pathogenesis and Clinical Findings Pars interarticularis stress fracture (spondylolysis) - most frequently in the most stressed vertebrae, L5-S1 => Weakened stability of lumbosacral joint => Forward slippage of vertebral body (spondylolisthesis) • Lumbosacral tenderness • Positive one-legged hyperextension test (Stork test) • XR — scotty dog sign on oblique view of vertebrae • CT - collar appearance of vertebrae • Shortened stride length due to tight hamstrings • Scoliosis #Spondylolysis #Spondylolisthesis #MSK #diagnosis #pathophysiology #signs #symptoms
