title: Acquisition of lytic spondylolisthesis in the adult.
abstract: Two adult patients are described with documented progression from a normally aligned spine to a lytic spondylolisthesis. In neither patient was the time of the pars fracture determined. Both patients complain of back pain with mild radicular symptoms.
authors.affiliation: Dewar Spine Unit, Department of Orthopaedics, Toronto Hospital, Ontario, Canada.
authors.forename: M H
authors.initials: MH
authors.lastname: Heggeness
authors.forename: S I
authors.initials: SI
authors.lastname: Esses
authors.forename: J P
authors.initials: JP
authors.lastname: Kostuik
mesh_terms: D000328:Adult; D001416:Back Pain / Q000209:etiology; D005260:Female; D006801:Humans; D008159:Lumbar Vertebrae / Q000000981:diagnostic imaging; D008297:Male; D009408:Nerve Compression Syndromes / Q000209:etiology; D010014:Osteolysis / Q000209:etiology*; D011859:Radiography; D013168:Spondylolisthesis / Q000150:complications / Q000000981:diagnostic imaging / Q000473:pathology*