This is a congenital or acquired abnormality in which the portion of the skull that holds the upper jaw deviates from the normal form, function, or position.
Also indexed as
Anomalies of jaw-cranial base relationshipAsymmetry of jawMandibular prognathismMandibular retrognathismMaxillary prognathismMaxillary retrognathismanomalies of relationship of jaw to cranial baseprognathism NOSretrognathia NOSretrognathism NOS