PubMed · 9577828
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J Helms. 1998. [Restorative operations].. https://pubmed.ncbi.nlm.nih.gov/9577828/
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We have not found in the literature an explanation for the intermittent and transient decreased lesser hearing sensation in patients with dysesthesia of the external auditory canal (EAC). In this paper we offer a possible explanation for it. Our hypothesis is that the stimulation of the sensory fibers of the trigeminal and facial nerves in the EAC is able to increase the stiffness of the ossicular chain by means of a reflex stimulation of malleus and stapes muscles. This intermittent and transient increase of the ossicular stiffness could explain the intermittent and transient decrease of hearing sensation in these patients.
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OBJECTIVE: To document the occurrence of a cavernous hemangioma of the external ear canal and to review the relevant literature. STUDY DESIGN Case report and literature review. METHODS: Review of a patient chart, imaging studies, operative report, and histologic findings. RESULTS: A cavernous hemangioma of the external ear canal not involving the tympanic membrane was surgically excised without complication. This is the third documented cavernous hemangioma of the external ear canal without tympanic membrane involvement in the English literature. Computed tomography scan is invaluable to narrow the differential diagnosis. Complete removal is curative. CONCLUSIONS: Cavernous hemangioma of the external ear canal with or without tympanic membrane involvement is a rare otologic entity amenable to surgical treatment. Temporal bone computed tomography scan imaging is an important preoperative diagnostic tool.