Contralateral Hearing Disturbance Following Posterior Fossa Surgery -Case Report-

Contralateral Sensorineural Hearing Loss (SNHL) after Vestibular Schwannoma Surgery: Report of 4 cases

“…Contralateral SNHL after VS removal is an extremely rare surgical complication, being described also in other posterior fossa procedures for other CPA tumours [4,5]. The mechanism of contralateral hearing loss remains unclear, including causes like meningitis, ototoxicity, acoustic trauma due to drill noise, vascular compromise, autoimmune reaction, and compensatory endolymphatic hydrops [5].…”

“…With regard to the treatment, established guidelines do not exist, and the use of high doses of corticosteroids has been recommended and the use of cochlear implants in cases with no recovery and complete hearing loss [4].…”

Contralateral hearing loss and facial palsy in an operated case of vestibular schwannoma—Case report

“…Contralateral hearing disturbance after acoustic neuroma surgery is extremely rare and its association with contralateral facial palsy is almost unheard of with the last report in 1983 [1]. Till date, literature review reveals only 14 patients with contralateral hearing loss after VS surgery [1], [2], [3], [4], [5], [6], [7], [8], [9].…”

Recurrent Contralateral Hearing Loss After 2 Craniotomies for Vestibular Schwannoma

“…Although half of the reported cases occurred after the translabyrinthine approach (1,3,5,6), there are also 5 reported cases from a retrosigmoid approach (6,7), 2 from a suboccipital approach (2,4), and one each from a middle fossa (3) and posterior fossa approach (8). Contralateral hearing loss has also been reported after posterior fossa approaches to other intracranial masses including epidermoids, meningiomas, and chordomas (8).…”

“…An innate vulnerability of the ear is likely in patients who experience SNHL in their contralateral ear. One high-risk anatomic feature that is postulated is a hyperpatent cochlear aqueduct (8). Although the cochlear aqueduct is typically patent in humans, serving as an interconnection between the CSF and perilymph spaces, it is so narrow that it typically insulates the perilymphatic compartment from pressure swings in the cerebellopontine angle cistern.…”