AI Article Synopsis
- This case report highlights carotid-cochlear dehiscence, a rare condition that can be serious if overlooked during ENT evaluations.
- It can mimic other ear-related issues due to the thinning bone separating the carotid canal from nearby structures.
- The report emphasizes the importance of detailed preoperative assessments, such as high-resolution CT scans, to correctly identify this condition, especially when typical symptoms are present.
Article Abstract
This case report describes carotid-cochlear dehiscence, a rare and possibly fatal condition if missed or ignored on initial work-up of several otologic procedures. Thinning of the bony plate separating the carotid canal from other anatomic structures can occur anywhere along the course of the canal, including the carotid-cochlear bony plate. This condition should be recognized by all otolaryngologists in that it can mimic other otologic pathologies. The aim of this report was to call attention to this condition and its associated mimicking symptoms and inform on its proper management. The idea for this review was formed from the case of a patient who presented with pulsatile tinnitus and was found to have carotid-cochlear dehiscence. Carotid-cochlear dehiscence is a rare anatomic variation of which the neurotologic surgeon should be aware. This condition can mimic common otolaryngologic pathologies that regularly present themselves in clinical settings. We present what we believe to be the fourth reported case of carotid-cochlear dehiscence in the literature. The patient presented having only the complaint of pulsatile tinnitus and was later diagnosed with this rare condition. We advocate a thorough preoperative work-up, including high-resolution computed tomography and careful operative planning in a case-specific manner. This is especially important when common pathologies do not become apparent after careful investigation.
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Article Synopsis
- This case report highlights carotid-cochlear dehiscence, a rare condition that can be serious if overlooked during ENT evaluations.
- It can mimic other ear-related issues due to the thinning bone separating the carotid canal from nearby structures.
- The report emphasizes the importance of detailed preoperative assessments, such as high-resolution CT scans, to correctly identify this condition, especially when typical symptoms are present.
Conductive hearing loss caused by third-window lesions of the inner ear.
Otol Neurotol
April 2008
Department of Otolaryngology, Massachusetts Eye and Ear Infirmary, Division of Health Sciences and Technology, Harvard University-Massachusetts Institute of Technology, Cambridge, Massachusetts 02114, USA.
Background: Various authors have described conductive hearing loss (CHL), defined as an air-bone gap on audiometry, in patients without obvious middle ear pathologic findings. Recent investigations have suggested that many of these cases are due to disorders of the inner ear, resulting in pathologic third windows.
Objective: To provide an overview of lesions of the inner ear resulting in a CHL due to a third-window mechanism.
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