Clinical, radiological and functional outcome of posterior-only three-column osteotomy in healed, post-tubercular kyphotic deformity: a minimum of 2-year follow-up

Purpose To describe clinical, radiological and functional outcomes of patients with post-tubercular healed kyphosis operated by posterior-only three-column osteotomy. Methods The hospital records of 47 patients from a single center, operated for healed, post-tubercular kyphosis were retrospectively analyzed. Deformity correction in all patients was done utilizing a three-column osteotomy by a single-stage, posterior-only approach. Radiological parameters (local kyphosis angle; KA, thoracic kyphosis; TK, lumbar lordosis; LL, pelvic tilt; PT, sacral slope; SS, C7 sagittal vertical axis; C7 SVA, pelvic incidence minus lumbar lordosis; PI-LL), functional scores and clinical details of complications were recorded. Results The median age of the study population was 16 years (6-45). The apex of deformity was in thoracic, thoracolumbar and lumbar spine in 22, 19 and 6 cases, respectively. The mean operative time was 197.2 ± 30.5 min and the mean operative blood loss was 701 ± 312 ml. KA (preoperative: 68.2° ± 26.9° v/s postoperative: 29.6° ± 20.3°; p value Conclusion Three-column osteotomies through posterior-only approach are safe and effective and offer good clinic-radiological and function outcome in post-tubercular kyphotic deformity correction.