title: Neonatal dermoid cyst of the floor of the mouth extending to the midline neck.
abstract: 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.
authors.affiliation: Division of Pediatric Otolaryngology, Children's Hospital and Medical Center, San Diego, CA, USA. dcbloom@hotmail.com
authors.forename: David
authors.initials: D
authors.lastname: Bloom
authors.forename: Daniela
authors.initials: D
authors.lastname: Carvalho
authors.forename: Joseph
authors.initials: J
authors.lastname: Edmonds
authors.forename: Anthony
authors.initials: A
authors.lastname: Magit
mesh_terms: D003884:Dermoid Cyst / Q000175:diagnosis / Q000473:pathology* / Q000601:surgery; D006258:Head and Neck Neoplasms / Q000175:diagnosis / Q000473:pathology* / Q000601:surgery; D006801:Humans; D007231:Infant, Newborn; D008279:Magnetic Resonance Imaging; D008297:Male; D009062:Mouth Neoplasms / Q000175:diagnosis / Q000473:pathology* / Q000601:surgery