Auditory and Vestibular Involvement in Congenital Cytomegalovirus Infection

Area of Science:

• Pediatrics
• Infectious Diseases
• Otolaryngology

Background:

• Congenital cytomegalovirus (cCMV) is a leading cause of non-hereditary sensorineural hearing loss (SNHL) in children.
• cCMV is associated with significant developmental disabilities and an underappreciated incidence of vestibular insufficiency (VI).
• The pathogenesis of SNHL and VI in cCMV involves direct viral effects and inflammatory responses.

Purpose of the Study:

• To summarize current knowledge on the natural history and pathogenesis of auditory and vestibular disorders in children with cCMV.
• To highlight the underestimation and potential impact of VI in cCMV.
• To discuss the variable presentation and progression of SNHL in cCMV.

Main Methods:

• Review of current literature on cCMV, SNHL, and VI.
• Analysis of existing data on the natural history and pathogenesis of auditory and vestibular dysfunction in cCMV.
• Synthesis of findings regarding the clinical presentation and progression of these disorders.

Main Results:

• cCMV contributes significantly to childhood hearing loss, with SNHL varying in severity, onset, and progression.
• Vestibular insufficiency (VI) is increasingly recognized as frequent in cCMV and linked to adverse neurodevelopmental outcomes.
• Newborn hearing screening may miss many cases of cCMV-related SNHL due to late-onset or fluctuating characteristics.

Conclusions:

• cCMV is a critical factor in pediatric SNHL and VI, necessitating further research into its natural history and pathogenesis.
• The variable nature of cCMV-associated auditory and vestibular deficits underscores the limitations of current screening methods.
• Understanding the full spectrum of cCMV's impact is crucial for timely diagnosis and intervention to improve neurodevelopmental outcomes.