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Clinical Problem Solving: Radiology
September 2005

Radiology Quiz Case 3: Diagnosis

Author Affiliations


Arch Otolaryngol Head Neck Surg. 2005;131(9):826-827. doi:10.1001/archotol.131.9.826

A dermoid cyst originating from the eustachian tube is a rare congenital anomaly, with only 14 cases reported in the literature, to our knowledge.1,2 Most cases occur in females and in the left ear.2 Approximately 7% of all dermoids develop in the head and neck area, and more than 50% of these are found in the periorbital region and 13% in the nasal cavity.3 Although dermoids are considered benign developmental malformations, their location within the relatively inaccessible eustachian tube, with resultant obstruction, can cause significant morbidity.4