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Hearing loss attributable to a cerebellopontine-angle arachnoid cyst in a child
Mahmoud Messerer1, Mustapha Nouri, Sylma Diabira
1Department of Neurosurgery, CHRU Pontchaillou, Rennes, France. m.messerer@laposte.net
Insights
Posterior-fossa arachnoid cysts (ACs) can cause late-onset hearing loss in children. Early diagnosis and surgical intervention are crucial, but optimal treatment for hearing loss remains unclear.
Area of Science:
- Neurology
- Pediatrics
- Otolaryngology
Background:
- Hearing loss in infants is often linked to congenital malformations or infections.
- Posterior-fossa arachnoid cysts (ACs) represent a less common but significant cause of hearing impairment.
Observation:
- An 8-year-old girl experienced hearing loss attributed to a pontocerebellar-angle AC, diagnosed and treated at 14 months old.
- The case highlights a delayed complication of ACs impacting auditory function.
Findings:
- The pathophysiology of late-onset hearing loss due to ACs requires further understanding.
- While advanced imaging detects ACs, it does not predict neural function or hearing status.
Implications:
- Close audiological monitoring and brainstem auditory evoked response testing are essential for children with posterior-fossa ACs.
- Surgical intervention for ACs should ideally precede the onset of complete hearing loss.
- Further research is needed to determine the most effective surgical strategies for hearing restoration in affected children.
Abstract:
Although hearing loss in newborns and infants is predominantly due to malformations and infections, there are other situations which may compromise hearing quality in later stages, including posterior-fossa arachnoid cysts (ACs). We report the case of an 8-year-old girl who presented with hearing loss linked to a pontocerebellar-angle AC which had been diagnosed and treated when she was 14 months old. The pathophysiology of this late AC complication is discussed. This case reminds us that a close follow-up with audiologic monitoring and/or brain stem auditory evoked response is necessary in children with posterior-fossa AC because modern neuroradiological imaging methods do not inform about cerebral and nerve functions, although they provide excellent morphological details of ACs and have improved the ease and accuracy of their early diagnosis. Therefore, surgery should be performed before complete hearing loss occurs; however, in hearing-impaired patients, it remains unclear which surgical treatment is most appropriate.
