Cerebro-costo-mandibular syndrome (CCMS) is characterized at birth by posterior rib gaps and orofacial anomalies reminiscent of Pierre Robin syndrome (see this term) that include palatal defects (short hard palate, absent soft palate, absent uvula), micrognathia and glossoptosis.

Posterior displacement of the tongue into the pharynx, i.e., a tongue that is mislocalised posteriorly.