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The Mondini defect in Turner's syndrome. A temporal bone report
Clinical Otolaryngology and Allied Sciences
|April 1, 1982
Summary
This study details the temporal bone histopathology of a deaf woman with Turner Syndrome, revealing a Mondini deformity and absent organ of Corti. The findings highlight a rare association between gonadal dysgenesis, congenital deafness, and non-gonadal tumors.
Area of Science:
- Otolaryngology
- Genetics
- Pathology
Background:
- Turner Syndrome (gonadal dysgenesis) is a genetic condition affecting females.
- Congenital deafness can arise from various genetic and environmental factors.
- The co-occurrence of specific genetic syndromes, sensory impairments, and neoplasms is an area of ongoing research.
Observation:
- Histopathological examination of the right temporal bone from a 47-year-old deaf female with Turner Syndrome was performed.
- The cochlea exhibited features of the Mondini deformity, characterized by a single basal turn and apical dilatation.
- The organ of Corti was notably absent, while the rest of the bony labyrinth, excluding the cochlear aqueduct, appeared normal.
Findings:
- The temporal bone pathology confirmed a severe malformation of the cochlea (Mondini deformity).
- Absence of the organ of Corti indicates a profound sensorineural hearing loss.
- The patient's death was attributed to a cerebral astrocytoma, suggesting a potential link between these conditions.
Implications:
- This case provides histopathological evidence of cochlear malformation in a patient with Turner Syndrome and congenital deafness.
- The findings may contribute to understanding the complex etiology of congenital hearing loss in individuals with genetic syndromes.
- Further research is warranted to explore the potential association between gonadal dysgenesis, specific inner ear malformations, and the predisposition to non-gonadal neoplasms.