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Bony dehiscence between singular canal and round window niche
1Elizabeth McCullough Knowles Otopathology Laboratory Dedicated to Hearing Research, Department of Otolaryngology, University of Pittsburgh School of Medicine, PA.
The Laryngoscope
|January 1, 1993
Summary
Bony dehiscence of the human singular canal is rare, found in 1% of individuals. These openings between the middle and inner ear or cerebrospinal fluid space have significant clinical implications.
Area of Science:
- Otolaryngology
- Anatomy
- Neurosurgery
Background:
- The singular canal transmits the singular nerve to the inner ear.
- Bony dehiscence, or absence of bone, can create abnormal pathways.
Purpose of the Study:
- To determine the incidence of bony dehiscence of the human singular canal.
- To investigate the anatomical location and potential clinical significance of these dehiscences.
Main Methods:
- Examination of 409 human temporal bones from 300 individuals.
- Documentation of dehiscences, their location, and associated microfissures.
Main Results:
- Bony dehiscence was found in 0.7% of bones and 1% of individuals.
- All cases occurred in males aged 2, 6, and 76 years.
- Dehiscences were located between the round window niche and the cribrose area of the singular canal.
Conclusions:
- Bony dehiscence of the singular canal is infrequent but clinically significant.
- These dehiscences may create abnormal communications between the middle ear, inner ear, or cerebrospinal fluid space.