Fig. 1 | Scientific Reports

Fig. 1

From: Radiologic and clinical outcomes of combining pedicle subtraction osteotomy and Smith–Peterson osteotomy in correcting severe ankylosing spondylitis kyphosis

Fig. 1

A 32-year-old male AS patient with severe thoracolumbar kyphosis underwent L1 PSO and L3/L4 SPO. (A1,A2). The preoperative radiograph showed: GK = 97°, LL = 26°, SVA = 26.3 cm, SS = 7°, PSO-OVA = 11°, SPO-OVA = 7°. B1,B2 Postoperatively, the PSO-OVA and SPO-OVA were corrected to − 21° and − 29°, respectively. The correction of GK was 74°. The LL, SVA and SS were improved to − 49°, 4.5 cm and 22°, respectively.

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