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Updated: May 14, 2026
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The Microscopic Transcanal Approach in Stapes Surgery Revisited
Published on: February 16, 2022
Crural attachment to promontory case report: implications for stapes development.
Kenneth R Whittemore1, Jenna M Dargie, Briana K Dornan
1Department of Otolaryngology and Communication Enhancement, Boston Children's Hospital, Boston, MA, USA. Kenneth.whittemore@childrens.harvard.edu
American Journal of Otolaryngology
|February 5, 2013
Summary
The embryologic origin of the stapes is debated. A case study found an abnormally attached stapes in a boy with hearing loss, suggesting distinct developmental origins for its parts.
Area of Science:
- Otolaryngology
- Embryology
- Anatomy
Background:
- The embryologic origin of the stapes, a crucial auditory ossicle, is not fully understood.
- Current theories debate whether the stapes develops from a single embryonic source or if its components (footplate and suprastructure) originate separately.
Observation:
- A 12-year-old male presented with left-sided conductive hearing loss.
- Computed tomography (CT) of the temporal bone revealed an inferiorly displaced left stapes and a nonspecific density in Prussak's space.
- Exploratory tympanotomy was performed to investigate the hearing loss.
Findings:
- Intraoperatively, the crura of the stapes were found to be attached to the promontory.
- The stapes footplate was correctly positioned in the oval window and demonstrated mobility.
- This anatomical configuration suggests a potential developmental anomaly.
Implications:
- This case provides evidence supporting the theory of distinct embryologic origins for different parts of the stapes.
- Understanding such variations is critical for diagnosing and managing congenital hearing loss.
- Further research into stapes development may refine surgical approaches and improve audiological outcomes.
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