Proximal junctional kyphosis and failure after spinal deformity surgery: a systematic review of the literature as a background to classification development.

Study Design: Systematic review of literature.

Objective: To perform a comprehensive English language systematic literature review of proximal junctional kyphosis (PJK) and proximal junctional failure (PJF), concentrating on incidence, risk factors, health related quality of life impact, prevention strategy, and classification systems.

Summary Of Background Data: PJK and PJF are well described clinical pathologies and are a frequent cause of revision surgery.

Long-term results of iliac wing fixation below extensive fusions in ambulatory adult patients with spinal disorders.

Study Design: Case series, level of evidence therapeutic IV.

Objective: Examine the results of bilateral iliac wing fixation in long fusions to the pelvis in ambulatory adult patients.

Summary Of Background Data: Adult spinal deformity surgery is an endeavor often fraught with complications.