Fig. 2

A 75-year-old male patient with low back and leg pain treated with PSO at L3 assised with satellite rods. (A, B) A preoperative standing anteroposterior and lateral spine full-length X-ray: Cobb angle of main curve = 45.2°, LL = 10.2°, PT = 44.2°, LL-PI = 30.6°, SVA = 6.5 cm, coronal balance was 4.1 cm. (C) A standing lateral full-length spine radiograph at postoperative. The radiograph showed Cobb angle of main curve = 24.9°, LL = 32.1°, PT = 14.5°, LL-PI = 3.7°, SVA = 0.4 cm, coronal balance was 0.9 cm. The patient’s low back and leg pain was completely disappeared. (D) At final follow-up the standing anteroposterior and lateral full-length radiographs showed the Cobb angle of main curve = 24.6°, LL = 30.9°, PT = 16.2°, LL-PI = 6.8°, SVA = 0.5 cm