Analysis of sagittal profile and radiographic parameters in symptomatic thoracolumbar disc herniation patients

Abstract Background Few studies describe thoracolumbar disc herniation (TLDH) as an isolated category, it is frequently classified the lower thoracic spine or upper lumbar spine. Thus, less known about morphology and aetiology of TLDH compared to (LDH). The aim study investigate sagittal alignment in analyze profile with radiographic parameters. Methods Data from 70 patients diagnosed were retrospectively reviewed. thoracic-lumbar was depicted by description curvatures (the apex curvature, inflexion point two curvatures) parameters complete standing long-cassette radiographs. rank sum test utilised compare parameter values each subtype. Results We found subtypes differentiated kyphotic curves. similar that normal population type I, presenting curve located middle well aligned disrupted II, region II patients. Thirty-six 34 II. mean vertical axis, T1 pelvic angle L1 27.9 ± 24.8°, 8.2 7.3° 6.2 4.9°, respectively. There significant difference ( p < 0.001) between I (14.9 7.9°) (29.1 13.7°). Conclusions presented distinctive profiles patients, a regional deformity balanced validated both subtypes. In degeneration accelerated kyphosis junction eventually caused herniation. excessive mechanical stress directly loaded at top (thoracolumbar region) rather than being diverted arc Mismatch shape sacral slope value observed, better agreement Type