Assertion: spondylolisthesis | /r/CreatedBy | defect
Facets:
value: most commonly
type: DEGREE
Source sentences:
text: Spondylolisthesis in the lumbar spine is most commonly caused by degenerative spinal disease (degenerative spondylolisthesis), or a defect in one region of a vertebra (isthmic spondylolisthesis).