- A very small lower jaw is the commonest finding in Pierre Robin syndrome. But the growth of the mandible seems to normalize by the 5th year of life, it however gives a characteristic appearance called as "bird facies."
- The tongue can turn backwards and appears to fall into the throat.
- The combination of a small lower jaw and the reverse tongue gives rise to acute breathing problems in a child because of airway blockage.
- Defects of the middle ear can lead to hearing loss
- Speech defects are common in Pierre Robin syndrome because of the unusual higly placed poition of the tongue and the lower jaw.
- Heart defects have also been encountered in this condition.
- Several muscular abnormalities like abnormally flexible joints and clubfeet are known to occur.
- Nervous system problems might include a delay in the understanding and development of language skills and ometimes can present as fits (epilepsy).
- A testis may not descend normally and is seen in 25 percent of the cases.