Macroglossia is a congenital disorder where the tongue is larger than normal. It is enlarged because of an increase in the amount of tissue, not because of a tumor or growth. There is also a perceived macroglossia in Down syndrome possibly because the tongue frequently protrudes.
Review Date 5/17/2019
Updated by: Neil K. Kaneshiro, MD, MHA, Clinical Professor of Pediatrics, University of Washington School of Medicine, Seattle, WA. Also reviewed by David Zieve, MD, MHA, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.