A full-term neonate was born with a mass measuring approximately 3 cm in diameter in the floor of the mouth. The mass had been identified during the course of the pregnancy and was aspirated in utero during the fifth month of gestation via ultrasound guidance at another institution. No analysis of the fluid was performed. The patient did not have any respiratory difficulty but was unable to suckle normally. Physical examination revealed a newborn of normal birthweight and development, with no external abnormalities. The patient exhibited no signs of respiratory distress (eg, stridor, flaring of the nostrils, or accessory muscle use).