Abstract
I report on a case of an idiopathic bone defect of the external auditory canal. A 62-year-old female patient presented with tinnitus and aural fullness in her right ear during biting. I confirmed the projection of the anterior wall of the external auditory canal during biting, and the projection was retracted when she opened her mouth. Computed tomography examination revealed a partial defect of the anterior wall of the bony external ear canal. I thought that this defect was caused by the failure of the foramen of Huschke to close during development.
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