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Magnetic resonance imaging scan (T1-weighted with fat saturation) with gadolinium contrast injected at the level of L4. a) Sagittal view and epidural spread. Axial views b) L3, c) L2, d) L4, and e) L5 b).
PM: psoas major; QLM: quadratus lumborum muscle
Yellow arrow: interforaminal spread; red arrow: lumbar plexus spread; blue arrow: paravertebral spread; green arrows: epidural spread
