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Glossoptosis is a medical condition and abnormality which involves the downward displacement or retraction of the tongue.[1] It may cause non-fusion of the hard palate, causing cleft palate.

It is one of the features of Pierre Robin sequence and Down syndrome.[1]


  1. ^ a b Donnelly, Lane F. (2016-08-10). Fundamentals of Pediatric Imaging E-Book. Elsevier Health Sciences. p. 22. ISBN 9780323444996.