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Table 3 Comparison of the PSO‚ VCD‚ VCR group in radiological and clinical outcomes

From: Vertebral column decancellation in Pott’s deformity: use of Surgimap Spine for preoperative surgical planning, retrospective review of 18 patients

  VCD PSO VCR p-value
Patients 18(8 M,13F) 23(12 M,11F) 10(6 M, 4F)  
Mean age (yrs) (range) 37.7(29 to 46) 35.6(25 to 43) 41.2(31 to 48) 0.23
Preoperative Konstam’s angle(°) 88.1(70–105) 63.5(52–81) 96.4(82–131) 0.04
Follow-up Konstam’s angle(°) 18.5(7–31)& 16.3(8–29)& 32.1(18–42)& 0.02
Preoperative SVA(cm) 5.3(3.6–5.9)) 4.5(2.2–5.1) 5.7(3.3–6.2) 0.31
Follow-up SVA(cm) 2.4(1.2–4.1)& 1.5(1.2–4.1)& 3.4(2.2–5.1)& 0.27
Preoperative TK(°)* 76.9(53–96) 65.2(51–85) 84.8(73–113) 0.03
Follow-up TK(°)* 14.3(10–23)& 16.3(12–32)& 32.5(24–62)& 0.02
Preoperative PI-LL(°)# 78.7(53–89) 62.3(42–74) 83.5(65–96) 0.01
Follow-up PI-LL(°)# 5.7(3–9)& 6.1(2–10)& 9.4(5–17)& 0.01
Operating time (mins) 225(200–260) 237(200–280) 370(320–400) 0.03
Loss of blood (ml) 475(400–600) 420(380–600) 625(500–980) 0.02
Complications (n)(%) 3(16.7) 4(17.4) 3(30) 0.03
Time of hospitalization(d) 11.3(7–17) 10.5(7–15) 15.2(10–21) 0.43
Preoperative VAS 7.1(6–9) 7.3(6–9) 8.4(7–9) 0.12
Follow-up VAS 1.8(1–3)& 1.5(1–4)& 4.1(3–7)& 0.02
Preoperative ODI(%) 65.8(59–84) 63.6(57–81) 74.8(65–89) 0.24
Follow-up ODI(%) 20.2(15–41)& 21.1(16–38)& 35.6(25–51)& 0.03
  1. VCD vertebral column decancellation, PSO pedicle subtraction osteotomy, VCR vertebral column resection, TK thoracic kyphosis, PI pelvic incidence, LL lumbar lordosis, SVA sagittal vertical angle, VAS visual analogue score, ODI oswestry disability index. &< 0.05 vs. preoperative data; *n = 11, measured when the apical vertebra was located at the thoracic level ; #n = 7,measured when the apical vertebra was located at the lumbar level.