Congenital dermoid cysts of the tongue.

A case of large dermoid cyst in the tongue in a 3 1/2-month-old child is presented. Histologically it was an epidermoid cyst. Typically corresponding cysts are diagnosed during the first four months of life. When the cyst was punctured, some keratin escaped and caused a granulation tissue reaction with granulocytes between the muscles of the tongue. The cyst was treated by marsupialization. No abnormality in the shape or function of the tongue was seen after 24 months.