Dermoid Cysts on the Floor of the Mouth

Objective: The authors analyzed the clinical features and treatment results of surgical patients with a final diagnosis of dermoid cyst on the floor of the mouth over 14 years at our hospital. Patients and Methods: A total of 5 patients with a final diagnosis of dermoid cyst of the floor of the mouth from January 2010 to December 2023 were enrolled. Results: All patients complained of swelling in the submentum or floor of the mouth. The mean tumor size was 4.2±1.0 cm. All patients underwent complete surgical resection. A transcervical approach was performed in 3 patients, and an intraoral approach was implemented in 2 patients. There were no major complications after surgery with either method. The follow-up period was 71.4±75.7 months. There was no disease recurrence during follow-up. Conclusion: Dermoid cysts rarely occur on the floor of the mouth but should be considered in the differential diagnosis of other oral cavity tumors. Dermoid cysts on the floor of the mouth can be safely removed using the current transoral approach without scarring or recurrence.