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Extracting the Cochlea from a Human Temporal Bone: A Cadaveric Protocol
Published on: August 18, 2023
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Diagnostic Protocol for Detecting Otosclerosis on High-Resolution Temporal Bone CT.
Lisa A Brown1, Burce Ozgen Mocan2, Miriam I Redleaf1
1Department of Otolaryngology-Head and Neck Surgery, The University of Illinois at Chicago, USA.
The Annals of Otology, Rhinology, and Laryngology
|July 11, 2019
Summary
A new checklist for high-resolution computed tomography (HRCT) accurately diagnoses otosclerosis (OS). This systematic protocol aids in surgical planning and patient counseling by improving diagnostic confidence on temporal bone imaging.
Area of Science:
- Radiology
- Otolaryngology
- Medical Imaging
Background:
- Otosclerosis (OS) is a common cause of conductive hearing loss.
- Accurate diagnosis of OS on temporal bone imaging is crucial for surgical planning.
- High-resolution computed tomography (HRCT) is a key imaging modality for evaluating OS.
Purpose of the Study:
- To introduce a systematic checklist for diagnosing otosclerosis (OS) on HRCT.
- To evaluate the efficacy of this HRCT protocol in identifying OS.
Main Methods:
- Retrospective case series of 17 ears with surgically confirmed OS and 21 control ears.
- Evaluation of preoperative HRCTs by a single neuroradiologist using a systematic protocol.
- Protocol focused on fissula ante fenestram and pericochlear lucency, and new bone formation.
Main Results:
- The protocol achieved 100% accuracy in diagnosing OS (17/17 test ears) and ruling out OS (21/21 control ears).
- Lucency at the fissula ante fenestram was present in all OS cases (17/17).
- New bone formation and cochlear lucency were observed in 53% and 47% of OS cases, respectively.
Conclusions:
- The developed HRCT checklist is a highly accurate tool for diagnosing otosclerosis.
- Systematic review of HRCT images enhances diagnostic confidence.
- Preoperative imaging facilitates patient counseling, surgical preparation, and exclusion of other pathologies.
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