Diagnosis and management of positional head deformity.

In children with positional head deformity (posterior plagiocephaly), the occiput is flattened with corresponding facial asymmetry. The incidence of positional head deformity increased dramatically between 1992 and 1999, and now occurs in one of every 60 live births. One proposed cause of the increased incidence of positional head deformity is the initiative to place infants on their backs during sleep to prevent sudden infant death syndrome. With early detection and intervention, most positional head deformities can be treated conservatively with physical therapy or a head orthosis ("helmet").