title: Congenital hypoplasia of the lumbar pedicle with spondylolisthesis: report of 2 cases.
abstract: Congenital hypoplasia of the spinal pedicle is a rare condition. Previously reported cases were treated conservatively or with posterior instrumented fusion. However, the absence or hypoplasia of the lumbar pedicle may increase the difficulty of pedicle screw fixation and fusion. Herein, the authors describe 2 cases of rare adult congenital hypoplasia of the right lumbar pedicles associated with spondylolisthesis. The patients underwent anterior lumbar interbody fusion with a stand-alone cage as well as percutaneous pedicle screw fixation. This method was used to avoid the difficulties associated with pedicle screw fixation and to attain solid fusion. Both patients achieved satisfactory outcomes after a minimum of 2 years of follow-up. This method may be an alternative for patients with congenital hypoplasia of the lumbar spinal pedicle.
mesh_terms: D000369:Aged, 80 and over; D059350:Chronic Pain / Q000209:etiology / Q000601:surgery; D006801:Humans; D017116:Low Back Pain / Q000209:etiology / Q000601:surgery; D008159:Lumbar Vertebrae / Q000002:abnormalities* / Q000000981:diagnostic imaging / Q000601:surgery*; D008297:Male; D008875:Middle Aged; D065289:Pedicle Screws; D013123:Spinal Fusion / Q000295:instrumentation / Q000379:methods*; D013168:Spondylolisthesis / Q000150:complications* / Q000000981:diagnostic imaging / Q000601:surgery*
keywords: ALIF = anterior lumbar interbody fusion; MRC = Medical Research Council; PPF = percutaneous pedicle screw fixation; VAS = visual analog scale; congenital hypoplasia; lumbar pedicle; spondylolisthesis