Relation between side of plagiocephaly, dislocation of hip, scoliosis, bat ears, and sternomastoid tumours.

Plagiocephaly is a common asymmetry of the skull which looks as if it has been compressed along a horizontal axis between one temple and the opposite side of the occiput. It is often seen in normal people, and is only very rarely due to underlying disease or malformation of the skull; such cases are not discussed here. The observation of plagiocephaly in a few children seen because of congenital dislocation of the hip (CDH) prompted a larger survey, which later extended to include normal children and children with bat ears, scoliosis, and stemomastoid tumours.