Lateral Interbody Fusion for Hyperlordosis and Negative Sagittal Vertical Axis Because of Accordion Phenomenon

The accordion phenomenon is defined as the difference in the disc space observed on x-ray or computed tomography images taken in both standing and supine positions, which results in a discrepancy of local spinal alignment. Oblique lateral interbody fusion (OLIF) is a less invasive method of potentially correcting both coronal and sagittal spinal alignment. We present the case of a 66-year-old woman with rheumatoid arthritis treated with OLIF for degenerative disc disease presenting with hyperlordosis and negative sagittal vertical axis (SVA) because of the accordion phenomenon.OLIF for severe degenerative disc disease presenting with hyperlordosis and negative SVA because of the accordion phenomenon may be effective.