MR Imaging of Lumbar Root Avulsion: Report of Two Case Studies

Lumbosacral nerve root avulsion is a rare disease entity that is usually associated with a fracture of the pelvic bone. We report on two cases to share our multimodal images and to introduce new magnetic resonance (MR) imaging findings. In one case (a pediatric patient), neither a history of pelvic ring fracture, nor a history of hip dislocation with characteristic MR myelography findings was evident. In the other case, secondary MR findings associated with lumbosacral nerve root avulsion were found that had not been introduced previously.