Pathologic significance of Meniere's symptom complex. A histopathologic and electron microscopic study

Area of Science:

• Otolaryngology
• Neurology
• Pathology

Background:

• Meniere's disease is clinically diagnosed based on symptoms like vertigo and hearing loss.
• Current treatments often target endolymphatic hydrops, a presumed cause.

Observation:

• A patient with unilateral Meniere's disease underwent surgical interventions including shunt operations and vestibular nerve section.
• Histopathologic examination of temporal bones was performed post-mortem.
• The vestibular nerve excised during surgery was also analyzed microscopically.

Findings:

• No endolymphatic hydrops were found in either temporal bone.
• Severe degenerative changes were observed in vestibular structures of the operated ear.
• Degeneration of sensorineural structures was noted in the basal cochlear turns.
• The excised vestibular nerve showed increased collagen and nerve fiber degeneration, suggesting a pathologic process.

Implications:

• Findings challenge the traditional understanding of Meniere's disease etiology and pathogenesis.
• A revised approach to Meniere's disease, considering vestibular nerve pathology, may be necessary.
• This case highlights the need for further research into the underlying causes of Meniere's symptom complex.