Tethering of the conus medullaris within the sacrum.
D000293:Adolescent; D002420:Cauda Equina / Q000002:abnormalities*; D002648:Child; D005260:Female; D006801:Humans; D007796:Laminectomy; D008067:Lipoma; D008297:Male; D009192:Myelography; D012447:Sacrum / Q000002:abnormalities*; D013120:Spinal Cord Neoplasms / Q000151:congenital*