Premature spinal fusion after insertion of magnetically controlled growing rods for treatment of early-onset scoliosis: illustrative case

BACKGROUND Magnetically controlled growing rod (MCGR) systems have gained attention for their use in the treatment of early-onset scoliosis. Although traditional growing rods require frequent operations to lengthen the construct, MCGR allows for fewer open procedures and more frequent distractions by externally controlling rod elongation. Despite its appealing advantages, MCGR is not without limitations. OBSERVATIONS The authors describe a case of premature spinal autofusion before growing rod removal and termination of rod distraction. LESSONS This case highlights the limitations of MCGR systems, including length of use, body habitus restrictions, and risk of autofusion.

Magnet Fracture within a Magnetically Controlled Growing Rod: A Case Report of a New Mechanism of Failure

Introduction: Magnetically controlled growing rods (MCGRs) have been widely adopted in the management of early-onset scoliosis since they were first described in 2012. Recent reports have highlighted concerns around their safety. To date, little is understood about the risk factors and modes of failure in these devices. Case Report: We report a novel mechanism of device failure in a 14-year-old patient following multiple revisions of MCGRs. Clinically, there was no evidence of device failure and the MCGRs appeared radiologically intact. Explantation analysis revealed multiple compromised/non-functional components. A previously undocumented phenomenon of complete magnet fracture was also seen. Conclusion: The absence of clinical or radiological features of device failure in this case makes the findings of great concern. Given the relative paucity of high-quality evidence surrounding the use of MCGRs, we support calls for urgent comparative studies and further investigation of risk factors for device failure. Keywords: Spinal surgery, Scoliosis, Magnetically controlled growing rods, Implant.