Comparative analysis of perioperative differences between hybrid versus pedicle screw instrumentation in adolescent idiopathic scoliosis.

Study Design: Retrospective review of patients with adolescent idiopathic scoliosis (AIS).

Objective: The objective of the study was to compare perioperative parameters and outcomes between pedicle screw and hybrid instrumentation for the treatment of AIS.

Summary Of Background Data: Pedicle screws have been shown to allow for better correction and fewer revisions than hybrid systems.

Clinical and radiological distinction between spondylothoracic dysostosis (Lavy-Moseley syndrome) and spondylocostal dysostosis (Jarcho-Levin syndrome).

In 1938, Saul Jarcho and Paul Levin from Johns Hopkins Hospital reported cases of thoracic insufficiency due to vertebral and rib anomalies. Nearly 30 years later, in 1966, Norman Lavy and associates from Indiana University reported a similar syndrome in a family from Puerto Rico. Lavy's description was followed by a report by John E.

Clinical efficacy of lumbar and lumbosacral fusion using the Boucher facet screw fixation technique.

The clinical outcome of posterolateral lumbar and lumbosacral fusions with facet screw fixation using the Boucher technique is reviewed retrospectively. The Boucher technique uses AO cortical screws that traverse the facet joint at an angle from the superior lamina, in a medial to lateral direction, to enter the respective inferior pedicle. The procedure was performed on 57 consecutive patients who had a degenerative disk disease.

Solitary (unicameral) bone cyst. The fallen fragment sign revisited.

The fallen fragment sign is a prominent radiologic feature in a minority of cases of unicameral bone cyst (20% in this series). This sign is always associated with pathologic fracture. Intramedullary fracture fragments may be single or multiple and may or may not be entirely dislodged from overlying periosteum.