Foramen of Huschke in the External Auditory Canal Misattributed to Temporomandibular Disorders: Case Reports
10.14476/jomp.2025.50.1.34
- Author:
Jung-Yong JIN
1
;
Won JUNG
Author Information
1. Department of Oral Medicine, Jeonbuk National University Hospital, Jeonju, Korea
- Publication Type:Case Report
- From:
Journal of Oral Medicine and Pain
2025;50(1):34-40
- CountryRepublic of Korea
- Language:English
-
Abstract:
Foramen of Huschke (FH) is a congenital defect of the external auditory canal (EAC) that may persist into adulthood. Although rare, it can present with symptoms that overlap with temporomandibular disorders (TMDs), leading to potential misdiagnosis. This report describes two cases of patients who exhibited common TMDs symptoms, such as temporomandibular joint (TMJ) sounds during function. However, neither patient demonstrated additional signs or symptoms indicative of TMDs in a comprehensive TMDs evaluation. Consequently, they were referred to an otolaryngologist for further assessment to investigate non-TMD etiologies. Cone-beam computed tomography (CBCT), frequently used in dental practice, is effective in assessing osseous structures but is limited in detecting soft tissue abnomalities. To achieve a more comprehensive evaluation, temporal bone computed tomography (TBCT) was performed. TBCT revealed an osseous discontinuity without other underlying causes, along with soft tissue bulging at the affected site, confirming the presence of the FH in the EAC. Given the limitations of CBCT in soft tissue visualization, advanced imaging modalities like TBCT should be considered in cases of persistent TMJ-related symptoms to improve diagnostic accuracy. These cases highlight the importance of differential diagnosis when evaluating patients with symptoms suggestive of TMDs, as soft tissue bulging through the FH can generate TMJ sounds during function, potentially mimicking TMD. Clinicians should consider that non-TMDs etiologies, such as the FH, as possible contributors to similar symptomatology. Accurate assessment and appropriate imaging studies are crucial for ensuring an accurate diagnosis and optimal management.
