Double Chin Deception: A Case of Intraoral Dermoid Cyst in the Floor of the Mouth
SUNIL VASUDEV, A. Praveena, SARAYU GOPAL, L. R. Harish
Asian Journal of Case Reports in Medicine and Health · pp. 73–78 · Published 21 Feb 2026
10.9734/ajcrmh/2026/v9i1295Abstract
Dermoid cysts of the oral cavity are rare, benign developmental lesions most commonly found in the midline of the floor of the mouth. They can present as painless swellings and may mimic other soft tissue masses, making diagnosis challenging. We report a case of a 35-year-old male who presented with a slow- growing, painless swelling in the submental region for over six months. Clinical examination revealed a midline swelling mimicking a “double chin” with intraoral extension elevating the floor of the mouth. MRI confirmed a well-defined, encapsulated cystic lesion situated above the mylohyoid muscle. Surgical excision was performed via an intraoral approach. Histopathology confirmed the diagnosis of a dermoid cyst. Although uncommon, dermoid cysts should be considered in the differential diagnosis of midline submental swellings, especially when intraoral involvement is present. Early diagnosis and complete excision are crucial to avoid complications and recurrence.
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