Fig. 2
From: Proximal junctional kyphosis in Lenke 5 AIS patients: the important factor of pelvic incidence
The pre-and postoperative radiographs of a 17-year-old female patient with high PI (PI = 58.7°) who developed PJK after surgery. She underwent a T6-L3 fusion. The PJA increased to 22.6° at 2 years’ follow-up (a to c). The thoracolumbar/lumbar curve was corrected from 46.1°to 7.8° (d to e). The UIV was T6 and the LIV was L3. The apex of thoracic kyphosis was T7. PI, pelvic incidence; SS, sacral slope; LL, lumbar lordosis; TK, thoracic kyphosis; GTK, global thoracic kyphosis; PJA, proximal junctional angle; TLK, thoracolumbar junctional kyphosis angle; SVA, sagittal vertical axis