Infection of Lumbar Spine

Lumbar spinal infections present a significant diagnostic and therapeutic challenge, requiring a multidisciplinary approach. Lumbar spine infection encompasses pyogenic, tuberculous, brucella, and fungal etiologies. Staphylococcus aureus predominates in pyogenic cases, and typically results following hematogenous spread. Mycobacterium tuberculosis frequently presents in endemic areas such as Southeast Asia, the Indian subcontinent, and Africa. Fungal spondylodiscitis, though rare, is emerging in immunocompromised populations. Nonspecific symptoms like lower back pain and absence of fever often delay diagnosis. Later in the course of the disease, symptoms including spinal deformity, neurological deficit, and spinal instability may develop. Imaging is crucial for assessment. Plain radiographs may appear unremarkable until substantial destruction of the vertebral body or intervertebral disc has occurred. Magnetic resonance imaging continues to be the reference standard for diagnostic evaluation, enabling prompt detection while offering excellent delineation of soft tissue structures. Nuclear medicine studies, including 18F-FDG PET/CT, offer whole-body evaluation and may be valuable in situations where magnetic resonance imaging is not feasible or for evaluation of therapeutic response. Conservative management with targeted antimicrobials is the primary treatment for uncomplicated cases. Empiric therapy should address common pathogens pending culture results. The optimal antibiotic duration, ranging from 6 to 12 weeks, remains controversial for pyogenic cases. Tuberculosis infection needs longer therapy and can range from 9 to 12 months of ant-tubercular treatment. Surgical intervention is warranted in the presence of neurological deficits, spinal instability, sizeable abscess formation, or failure of non-operative management. Minimally invasive techniques are increasingly employed for abscess drainage and percutaneous instrumentation. Complications following lumbar spine infections may include chronic pain, neurological deficits, and spinal deformity. Long-term follow-up is essential for the detection of any relapse and sequelae management. In conclusion, lumbar infective spondylodiscitis demands high clinical suspicion for prompt diagnosis. While imaging and treatment advances have improved outcomes, challenges persist in managing resistant organisms and optimizing surgical approaches. Future research should focus on developing targeted therapies, refining treatment algorithms, and addressing the complexities of antibiotic-resistant infections in this challenging condition.