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Ultrasound images at the L2–L3 level in a 6-months-old child. Solid black arrows; ligamentum flavum, dashed arrows; dura mater. SP: spinous process. (A) Triangular epidural space is seen in left transverse plane image. (B) Conus medullaris (CM) at the upper level of L2, spinal nerve roots, and cauda equina fibers are seen in right longitudinal plane image.
