Free Vascularized Osseous Fibula Flap for Vertebral Body Defect in a Patient with Tuberculosis Spondylitis

Summary: In the context of tuberculous spondylitis, a rare form of extrapulmonary tuberculosis causing significant discomfort and neurological deficits, surgery becomes imperative to alleviate symptoms alongside antituberculosis treatment. However, the utilization of free vascularized fibula flaps for repairing vertebral deformities remains uncommon. This report presents the case of a 21-year-old man with limb weakness and sensory disturbances who was referred to our hospital, where contrast magnetic resonance imaging revealed a paravertebral abscess spanning several thoracic vertebrae. Collaborating with neurosurgeons, we performed decompression laminectomy, pedicle screw fixation, thoracic vertebrectomy, and restoration of the corporal defect using a free fibula flap. Utilizing a 2.5-cm fibula segment from the patient's left leg without a skin paddle, the surgery demonstrated a pedicle length of 12 cm and a total ischemic time of 183 minutes. The fibula was press-fitted, with recipient vessels identified as 1-mm artery and vein from the intercostal artery perforator. Postsurgery, flap vitality was assessed using Doppler ultrasound, showing positive signals immediately and at 1-month follow-up, with the patient experiencing reduced pain and improved leg strength. Despite its rarity, free fibula flap reconstruction for spinal defects proves effective, safe, and beneficial, necessitating thorough preoperative planning and interdisciplinary collaboration for successful outcomes, marking this case as the first reported instance in Indonesia.