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Fig. 1 | BMC Musculoskeletal Disorders

Fig. 1

From: The clinical relevance of the presence of bridging syndesmophytes on kyphosis correction and maintenance following pedicle subtraction osteotomy for thoracolumbar kyphotic deformity in ankylosing spondylitis: a comparative cohort study

Fig. 1

a, b 36-year-old AS patient, with circumferential ossification of ALL along multiple segments causing a long sweeping thoracolumbar kyphosis (GK: 91°, TK: 57°, LL: 11°, SVA: 22.9 cm, SS: 10°, PI: 42°). Following a PSO at L2 level, significant pre to post-operative improvements were detected concerning correction of GK, LL, SS and SVA (GK: 36°, TK: 54°, LL: -35°, SVA: 4.0 cm, SS: 16°). The contribution of adjacent disc wedging to total correction per PSO was 0% (c, d). At final follow-up, the obtained correction remained stable (GK: 40°, TK: 53°, LL: -34°, SVA: 6.5 cm, SS: 17°) (e, f)

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