 In the case of a dentigerous cyst, marsupialization may be performed to allow the growing tooth associated with the cyst to continue eruption into the oral cavity.It is also in use in dacryocystorhinostomy surgery in which the lacrimal sac mucosa is connected to the nasal mucosa above the level of the mechanical obstruction at the nasolacrimal duct.When, due to an error of diagnosis, the technique is applied to a dermoid cyst (teratoma) or other tumor, the risk of subsequent tumor recurrence and cancer is much increased.