Asymmetry of the head is a common occurrence in infants and may have a number of etiologies, including positional deformity, simple craniosynostosis, complex craniofacial synostosis, metabolic bone disease,depressed skull fracture, microcephaly due to brain damage, and hydrocephalus. Deformations of the head attributable to prenatal compression usually resolve by the time a child is 2 months of age. However, a number of centers have reported a recent increase in the occurrence of cranial deformations in infants older than 6 months, which is attributed to the current recommendation that children sleep on their backs to avoid sudden infant death syndrome.

Synostosis of a single suture may lead to only cosmetic changes, but synostosis of several sutures may be life-threatening and lead to increased intracranial pressure, loss of vision, and severe deformities that affect social interactions. Primary craniosynostosis,which is defined as synostosis without an underlying abnormality of the brain or metabolic defect, occurs...

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