Which of the following is a contraindication to cochlear implantation?

• A Cochlear nerve aplasia confirmed on MRI ✓
• B Bilateral cochlear ossification secondary to meningitis
• C Age less than 12 months with bilateral profound SNHL
• D Mondini dysplasia with dilated vestibular aqueduct

Explanation

Cochlear nerve aplasia (absent cochlear nerve on MRI) is an absolute contraindication to cochlear implantation because electrical stimulation of the spiral ganglion cannot be transmitted to the brain. Cochlear ossification is a technical challenge but not a contraindication. Implantation is approved from 12 months of age. Mondini dysplasia and dilated vestibular aqueduct are relative anatomical challenges but not contraindications.

Reference: Dhingra Diseases of Ear, Nose and Throat, 7th ed.

High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP

Written and medically reviewed by the StethoPrep medical team.