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<p>Magnet extrusion is a rare but serious complication of cochlear implantation. Repeated magnet manipulation for magnetic resonance imaging can cause mechanical and soft-tissue failure. We report a case of 23-year-old male who underwent left cochlear implantation in 2008 for congenital bilateral profound sensorineural hearing loss. He also has underlying Arnold-Chiari malformations, syringomyelia and neuromuscular scoliosis. Following the need for magnetic resonance imaging of the spine to reassess his syringomyelia condition, the magnet was removed and reinserted back in 2017. In late 2024, he presented with magnet extrusion with no sign of infection. Intraoperative findings showed fractured silicone magnet housing, which caused the magnet migration. The magnet was displaced and located just at the subcutaneous area while the implant is still in the original operated area. The extruded magnet was removed and replaced, and a temporalis myofascial flap was used for reinforcement. Postoperative recovery was uneventful, and device function was fully restored. Repeated magnet manipulation may compromise silicone housing and overlying scalp integrity. Early surgical intervention with vascularized tissue coverage allows device salvage and prevents further complications.</p>

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Magnet Extrusion in Cochlear Implants due to Silicone Housing Fracture: Successful Salvage with a Temporalis Flap

  • 期刊论文

  • 发表日期：

    2026年2月7日

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  • Abdul Hafeez Asyraf Abdul Mohsin Rejaludin,
  • Nurul Afza Mahmud,
  • Nurhamidah Jamaludin,
  • Izny Hafiz Zainon,
  • Mohd Khairi Md Daud

摘要

Magnet extrusion is a rare but serious complication of cochlear implantation. Repeated magnet manipulation for magnetic resonance imaging can cause mechanical and soft-tissue failure. We report a case of 23-year-old male who underwent left cochlear implantation in 2008 for congenital bilateral profound sensorineural hearing loss. He also has underlying Arnold-Chiari malformations, syringomyelia and neuromuscular scoliosis. Following the need for magnetic resonance imaging of the spine to reassess his syringomyelia condition, the magnet was removed and reinserted back in 2017. In late 2024, he presented with magnet extrusion with no sign of infection. Intraoperative findings showed fractured silicone magnet housing, which caused the magnet migration. The magnet was displaced and located just at the subcutaneous area while the implant is still in the original operated area. The extruded magnet was removed and replaced, and a temporalis myofascial flap was used for reinforcement. Postoperative recovery was uneventful, and device function was fully restored. Repeated magnet manipulation may compromise silicone housing and overlying scalp integrity. Early surgical intervention with vascularized tissue coverage allows device salvage and prevents further complications.