Mahatthanatrakul A, et al. - To know the variations in different intervertebral disc level due to lumbar sympathetic chain (LSC) relationship with surgical corridor for minimally invasive retroperitoneal anterolateral oblique approach, researchers studied axial magnetic resonance imaging images at L2–3, L3–4 and L4–5 intervertebral disc levels of 144 patients. They identified LSC in 90.9% of levels. They observed a statistical difference between L2–3 and L4–5 level. They found the distance between LSC and psoas muscle at each level of 3.1 mm, 3.3 mm and 4.0 mm in the non-scoliosis group. They also recorded the statistical difference between L2–3 and L4–5 level and between L3–4 and L4–5 level. In L4–5 disc level, LSC moved away from psoas muscle and became closer to the aorta.