Bony masses projecting into the spinal canal opposite a break in the neural arch of the fifth lumbar vertebra.
D015519:Bone Density; D006801:Humans; D008159:Lumbar Vertebrae; D013115:Spinal Canal; D013122:Spinal Diseases; D013131:Spine / Q000002:abnormalities*
SPINAL CANAL; SPINE/abnormalities