Anterior plagiocephaly is always due to unicoronal craniosynostosis. Female to male ratio is 68%. Unicoronal synostosis produces regional growth restriction and compensatory expansion of adjacent regions and obvious fronto-orbital dysmorphology 1)

1)
G. Silav, G. Avci, M. Akan, G. Taylan, I. Elmaci, and T. Akoz, “The surgical treatment of plagiocephaly,” Turkish Neurosurgery, vol. 21, no. 3, pp. 304–314, 2011.