Lumbosacral Transitional Vertebrae in Adolescents: Effects on the Short-Term Outcomes of Percutaneous Endoscopic Lumbar Discectomy

Figure 3

Measurement of LLA, SSA, and iliac crest height. SSA: sacral slope angle; LLA: lumbar lordosis angle; iliac crest height (we measured the distance on lateral radiographs between the upper margin of the L5 vertebrae and the highest point of the iliac crest as the iliac crest height).