Contact dermatitis to silicone after cochlear implantation

Area of Science:

• Otolaryngology
• Dermatology
• Biomaterials Science

Background:

• Cochlear implantation is a common procedure for hearing restoration.
• Complications, though rare, can occur, necessitating careful patient monitoring.
• Skin reactions at the implantation site require thorough investigation.

Purpose of the Study:

• To report a case of silicone contact dermatitis in a pediatric patient following cochlear implantation.
• To identify the specific silicone component responsible for the hypersensitivity reaction.
• To highlight the diagnostic and management approach for such complications.

Main Methods:

• Clinical presentation of persistent erythema, pruritus, and serous discharge at the cochlear implant site.
• Diagnostic patch testing to identify the causative agent.
• Device explantation and subsequent reimplantation with an alternative device.

Main Results:

• Patch testing confirmed contact dermatitis to silicone LSR-30 used in the Nuclear Contour-24 and Med-el devices.
• No hypersensitivity was observed to silicone LSR-70 in the Advance Bionics device.
• Explantation led to complete symptom resolution, and reimplantation was successful.

Conclusions:

• Erythema and irritation at the cochlear implant site, even without leukocytosis, should raise suspicion for silicone contact dermatitis.
• Identifying specific silicone sensitivities is critical for successful device management and reimplantation.
• This case underscores the importance of considering biomaterial hypersensitivity in device-related complications.