<sec><title>Study Design</title><p>Retrospective case series.</p></sec><sec><title>Purpose</title><p>To investigate the clinical efficacy and feasibility of one-stage anterolateral debridement, bone grafting, and internal fixation for treating lumbosacral tuberculosis.</p></sec><sec><title>Overview of Literature</title><p>There has been no consensus regarding the optimal means of treating lumbosacral tuberculosis. The one-stage anterolateral extraperitoneal approach for radical debridement, bone grafting, and internal fixation for treating lumbosacral tuberculosis is rare in literature.</p></sec><sec><title>Methods</title><p>Twenty-one patients with lumbosacral tuberculosis were retrospectively analyzed. All patients underwent the surgery of anterolateral debridement after regularly antituberculous drugs therapy. We evaluated the erythrocyte sedimentation rate, C-reactive protein, radiography, computed tomography, magnetic resonance imaging, visual analogue score, and Oswestry disability index before and after surgery.</p></sec><sec><title>Results</title><p>All patients completed a follow-up survey 9–48 months after surgery. All patients' wounds healed well without chronic infection or sinus formation, and all patients with low-back pain reported relief after surgery. All cases had no tuberculosis recurrence. Solid bony fusion was achieved within 6–12 months. At final follow-up, evaluated the erythrocyte sedimentation rate decreased from 38.1±12.5 to 11.3±7.1 mm/hr, C-reactive protein decreased from 6.2±4.2 to 1.6±1.3 mg/dL, the visual analog scale score decreased from 4.6±1.1 to 1.4±1.0, the Oswestry disability index score decreased from 50.2%±11.9% to 13.0%±6.6%, and the lumbosacral angle increased from 20.0°±4.8° to 29.0°±3.9° (<italic>p</italic><0.05).</p></sec><sec><title>Conclusions</title><p>One-stage anterolateral debridement, bone grafting, and internal instrument fixation for treating lumbosacral tuberculosis is safe and effective.</p></sec>