A 7-year-old child with bilateral profound sensorineural hearing loss is being evaluated for cochlear implantation. High-resolution CT shows bilateral incomplete partition type II (Mondini deformity) cochleae. Which of the following is a recognized complication specific to this anatomy during surgery?
- A Gusher (perilymphatic gusher) from patent cochlear aqueduct
- B Total electrode array insertion failure
- C Cerebrospinal fluid gusher from widened cochlear modiolus ✓
- D Device rejection due to nickel allergy
Correct answer: C. Cerebrospinal fluid gusher from widened cochlear modiolus
Explanation
Incomplete partition type II (Mondini) is characterized by a modiolar deficiency and widened cochlear aqueduct communication with the internal auditory canal. During cochleostomy, a CSF gusher can occur due to abnormal connection between subarachnoid space and cochlear fluid spaces. Packing the cochleostomy around the electrode controls this. Option A refers to a specific pediatric X-linked deafness risk; C correctly identifies the Mondini-specific risk.
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.