Intralingual foregut duplication cyst in a newborn.

Congenital lingual cystic masses are challenging entities that can be detected prenatally or discovered in various forms after birth. We report what we believe is only the ninth case of an intralingual foregut duplication cyst that was lined with gastric mucosa. The preoperative evaluation of lingual cystic masses in newborns can include palpation, high-resolution sonography, computed tomography (CT), or magnetic resonance imaging (MRI). However, CT and MRI can pose a risk to the infant because they require sedation in order to properly position the patient for imaging. In our patient, we found that high-resolution sonography was most useful in revealing the nature of the mass as a nonvascular cystic lesion and in delineating its extension. We excised this lesion via bipolar cautery, which we prefer to cold-knife or CO2 laser surgery.