Nasopharyngeal teratomas.

Teratomas are the most common congenital tumors, but neoplasms of the nasopharynx are rare in neonates and children. Four histologic types of nasopharyngeal teratomas occur-dermoids, teratoids, true teratomas, and epignathi-of which dermoids comprise the vast majority. A case is presented of a neonate born at term exhibiting signs of respiratory difficulty, which were found to be caused by a true teratoma of the nasopharynx.