May Be Caused by

 Common

Achondroplasia

Cephalohematoma

Cerebral palsy

Depressed fracture

Dyke-Davidoff-Masson syndrome

Fibrous dysplasia

Hydrocephalus

Leontiasis ossea

Localized cerebral atrophy

Obstetrical trauma

Osteoma

Osteosarcoma

Paget disease of bone

Positional plagiocephaly

Postoperative deformity

Postural asymmetry from scoliosis

Premature craniosynostosis

Sturge-Weber syndrome

Trauma

 Uncommon

Acromesomelic dysplasia

Arachnoid cyst

Cerebral cyst

Chronic subdural hematoma

Craniopagus twins

Cranium bifidum

Crouzon syndrome

Dandy-Walker syndrome

Encephalocele

Healed rickets with bossing

Hemimegancephaly

Hygroma

Hyperphosphatasia

Hypertelorism

Hypomelanosis of Ito

Lacunar skull

Microcephaly

Neurofibromatosis

Osteogenesis imperfecta

Porencephalic cyst

Proteus syndrome

Silver-Russell syndrome