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Histopathological findings in clinical gentamicin ototoxicity
Abstract:
The temporal bone histopathological findings in a case of gentamicin sulfate-induced hearing loss and vertigo in an anephric patient undergoing hemodialysis are presented. A study of the sensory neuroepithelium of the cristae and maculae disclosed the presence of vacuoles with clubbing of the sensory cells. In the cochlea, loss of the innermost row of outer hair cells in the basal turn was the most prominent feature. These findings are discussed in light of reports of similar morphological changes in laboratory studies of gentamicin ototoxicity.
Insights
Gentamicin sulfate caused hearing loss and vertigo in a hemodialysis patient. Histopathology revealed sensory cell damage in the inner ear, consistent with gentamicin ototoxicity.
Area of Science:
- Ototoxicology
- Nephrology
- Histopathology
Background:
- Gentamicin sulfate is an antibiotic with known ototoxic potential.
- Anephric patients undergoing hemodialysis are a unique population with altered drug metabolism and excretion.
- Understanding the specific histopathological effects of gentamicin in this patient group is crucial.
Observation:
- Temporal bone histopathology was examined in an anephric patient on hemodialysis who experienced hearing loss and vertigo.
- Microscopic examination revealed vacuoles and clubbing of sensory cells in the cristae and maculae of the inner ear.
Findings:
- The most significant cochlear finding was the loss of the innermost row of outer hair cells in the basal turn.
- These morphological changes in the sensory neuroepithelium are consistent with gentamicin-induced ototoxicity.
Implications:
- This case provides direct histopathological evidence of gentamicin ototoxicity in an anephric, hemodialysis patient.
- The findings correlate with previous laboratory studies on gentamicin-induced hearing loss.
- Highlights the importance of monitoring for ototoxic effects in patients with renal impairment receiving gentamicin.