Classification & external resources
Cleidocranial dysostosis or Cleidocranial dysplasia is a hereditary congenital abnormality of humans due to haploinsufficiency caused by mutations in the CBFA1 gene, on  the short arm of chromosome 6.
Additional recommended knowledge
It has one or more of these features:
- The collarbones are partly or completely missing. If they are completely missing, the shoulders can touch each other in front of the chest.
- The fontanelles of the skull are late in closing, or never close.
- Extra teeth
- Permanent teeth not erupting.
- Bossing (= bulging) of the forehead.
Although he has not said he has the condition, the comedian Emmett Furrow has no collarbones. 
|Congenital malformations and deformations of musculoskeletal system (Q65-Q79, 754-756)|
|Limbs||hip: Dislocation of hip/Hip dysplasia
feet (Club foot, Flat feet, Pes cavus)
head, face, spine and chest: skull, face and jaw (Dolichocephaly, Plagiocephaly) - Scoliosis - chest (Pectus excavatum, Pectus carinatum)
Polydactyly/Syndactyly (Webbed toes)
reduction deficits (Ectrodactyly, Amelia, Phocomelia)
upper limb (Cleidocranial dysostosis, Madelung's deformity, Sprengel's deformity)
knee (Genu valgum, Genu varum)
|Skull and face bones||Craniosynostosis (Scaphocephaly) - Trigonocephaly - Oxycephaly - Crouzon syndrome - Hypertelorism - Macrocephaly - Treacher Collins syndrome - Platybasia|
|Spine and bony thorax||Klippel-Feil syndrome - Spondylolisthesis - Cervical rib - Bifid rib|
|Osteochondrodysplasia||growth of tubular bones and spine: Achondrogenesis - Thanatophoric dysplasia - Short rib-polydactyly syndrome - Chondrodysplasia punctata (Rhizomelic chondrodysplasia punctata, Conradi-Hünermann syndrome), Achondroplasia (Hypochondroplasia, Osteosclerosis congenita) - Ellis-van Creveld syndrome - Spondyloepiphyseal dysplasia congenita|
Osteogenesis imperfecta - McCune-Albright syndrome - Osteopetrosis - Metaphyseal dysplasia - Hereditary multiple exostoses - Osteopoikilosis - Chondrodystrophy - Osteodystrophy
|Other||abdominal wall (Congenital diaphragmatic hernia, Omphalocele, Gastroschisis, Prune belly syndrome) - Ehlers-Danlos syndrome|
|See also non-congenital conditions (M, 710-739)|