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David Bloom, MD; Daniela Carvalho, MD; Joseph Edmonds, MD; Anthony Magit, MD

Arch Otolaryngol Head Neck Surg. 2002;128:68-70.

We describe a male neonate who presented at birth with a compressible dermoid cyst that extended from the floor of the mouth to the midline of the neck. Ultrasonography revealed a fluid-filled sublingual mass. Magnetic resonance imaging performed when the patient was 1 week old demonstrated a 2-cm, cystic, left-sided, sublingual mass that crossed the midline without extension inferior to the mylohyoid muscle. At 3 months of age, the patient developed a 1-cm, solid, submental mass. At the time of surgery, the lesion had a fibromembranous tract that extended through the myolohyoid muscle to a 1-cm cyst in the submental region. Histologic sections depicted 2 dermoid cysts and a connecting fistula. This case represents the first report (to our knowledge) of a dermoid cyst presenting in a neonate as a mass in the floor of the mouth with extension to the midline of the neck.

From the Division of Pediatric Otolaryngology, Children's Hospital and Health Center, San Diego, Calif (Drs Bloom, Carvalho, Edmonds, and Magit), and the Divisions of Otolaryngology–Head and Neck Surgery, Naval Medical Center San Diego (Dr Bloom) and University of California, San Diego (Drs Carvalho and Magit).