Anterior lingual thyroglossal cyst: antenatal diagnosis, management, and long-term outcome.

Objective: To describe the long-term outcome of a large anterior lingual thyroglossal duct cyst, diagnosed antenatally by ultrasound that completely obstructed the oral cavity and had almost completely replaced the anterior two-thirds lingual musculature.

Methods: Longitudinal observation.

Results: Anticipated airway obstruction at birth did not occur. Complete cyst removal occurred at day 2 of life with a rim of lingual muscle observed present only on the left side. Complete and safe oral feeding was achieved by day 11 of life. Progressive muscle mass development and function with mild asymmetry was observed during sequential assessments. Vigorous speech therapy was started at age 7 months achieved 80-100% intelligible speech with minimal misarticulations at age 33 months.

Conclusion: This case demonstrates the remarkable compensatory ability of the tongue to achieve almost normal function with minimal anterior musculature that is critical to deglutition and articulation. Early speech therapy appears key to improving functional outcomes of speech. A strong central nervous system basis for suckle development is suggested by the rapid development of a safe and effective suckle and swallow soon after cyst resection and in spite of in utero tongue fixation.