A dermoid cyst in the floor of mouth accounts for 1 1 6 of all dermoid cysts 1 3 4.
Floor of the mouth dermoid.
The dermoid cysts of the mouth are most frequently located on the median line of the mouth floor most likely caused by the retention of the germinal epithelium during the growth of the mandible and hyoid branchial arches and are considered rare 2 3 5 10.
Cysts superficial to geniohyoid may cause posterosuperior displacement of the tongue dysphonia dysphagia 3 or airway obstruction 4.
A classification of these cysts based on histopathologic findings is presented in this article and it is suggested that the worddermoid be retained as a clinical term for all these developmental cysts of the floor of the mouth.
A case is reported which shows differences in the epithelial lining of the cysts found followed by the differential diagnosis and treatment.
Four cases of dermoid cysts of the floor of the mouth.
Excision of the lesion confirmed a diagnosis of dermoid cyst of the floor of mouth.
Dermoid cysts of the floor of the mouth are discussed as to their embryology development and classification.
Meyer proposes the classification of the cysts based on the histological differentiation of the elements of the cyst wall.
Dermoid cysts of the floor of the mouth in the infant are rarely encountered although the aetiology is mainly embryological.