Prenatal sonographic detection of nasopharyngeal teratoma

We present the case of a 34-year-old pregnant woman who had an elevated mat ernal serum alpha-fetoprotein level and sonographic findings of a semisolid mass protruding from the fetus's oral cavity. The large, heterogeneous mas s filled the oropharynx and nasopharynx. Abnormal Doppler waveforms were de tected in the umbilical artery of the fetus, who died in utero. Postmortem examination revealed a nasopharyngeal teratoma. (C) 1999 John Wiley & Sons, Inc.