prespondylolisthesis

pre·spon·dy·lo·lis·the·sis

(prē-spon'di-lō-lis-thē'sis),

A condition predisposing to spondylolisthesis, consisting of a defect in the laminae of a lumbar vertebra but before development of any displacement of the vertebral body. See: spondylolysis.

prespondylolisthesis

(prē-spŏn″dĭl-ō-lĭs-thē′sĭs) [″ + Gr. spondylos, vertebra, + olisthanein, to slip]

A congenital defect of both pedicles of the fifth lumbar vertebra without displacement, predisposing the individual to spondylolisthesis.