Short answer · Medically reviewed summary · Last updated: 2026-05-08
Cleidocranial dysplasia is a hereditary condition that follows an autosomal dominant inheritance pattern, meaning an affected individual has a 50% chance of passing the gene mutation to each child. While it is strongly hereditary, approximately 40% of cases occur as *de novo* mutations, meaning the condition arises spontaneously in a person with no family history. Is Cleidocranial dysplasia always inherited? Cleidocranial dysplasia is primarily caused by mutations in the RUNX2 gene.
2 people with Cleidocranial Dysplasia have shared their first-person experience on this question at DiseaseMaps.
Is Cleidocranial Dysplasia hereditary?
Is Cleidocranial Dysplasia hereditary? The genetic component explained in plain language, reviewed against medical sources, with patient experiences.
Cleidocranial dysplasia is a hereditary condition that follows an autosomal dominant inheritance pattern, meaning an affected individual has a 50% chance of passing the gene mutation to each child. While it is strongly hereditary, approximately 40% of cases occur as *de novo* mutations, meaning the condition arises spontaneously in a person with no family history.
Is Cleidocranial dysplasia always inherited?
Cleidocranial dysplasia is primarily caused by mutations in the RUNX2 gene. While it is a genetic condition, it is not always inherited from a parent. Because the condition is autosomal dominant, a single copy of the mutated gene is sufficient to cause the phenotype. However, many individuals are the first in their family to have Cleidocranial dysplasia due to a spontaneous genetic change occurring at conception, which is referred to as a de novo mutation.
What is the risk of passing on Cleidocranial dysplasia?
For individuals confirmed to have Cleidocranial dysplasia, the inheritance risks are well-defined by Mendelian genetics:
- Autosomal Dominant Inheritance: Each child of an affected parent has a 50% statistical probability of inheriting the RUNX2 mutation.
- Variable Expressivity: Even within families, the severity of Cleidocranial dysplasia can vary significantly between affected individuals, ranging from mild dental issues to more pronounced skeletal changes.
How is genetic testing used for diagnosis and family planning?
Molecular genetic testing for Cleidocranial dysplasia involves sequencing the RUNX2 gene to identify pathogenic variants. Testing is recommended for individuals showing clinical features such as delayed closure of the fontanelles, supernumerary teeth, or hypoplastic clavicles. For families with a known mutation, prenatal diagnosis via amniocentesis or chorionic villus sampling (CVS) is available. Furthermore, preimplantation genetic testing (PGT) can be used during IVF to select embryos without the RUNX2 mutation.
What is the role of genetic counseling?
Genetic counseling is essential for families managing Cleidocranial dysplasia to understand recurrence risks and the implications of the RUNX2 mutation. Counselors help families navigate the emotional and clinical aspects of the condition, particularly when planning pregnancies or evaluating other family members who may be asymptomatic carriers of Cleidocranial dysplasia.
Next steps
- Consult with a clinical geneticist to confirm a diagnosis through RUNX2 gene sequencing.
- Connect with the 89 members of the DiseaseMaps.org community to share experiences and coping strategies.
- Request a referral to a genetic counselor to discuss family planning and reproductive options.
Medical disclaimer: This information is for educational purposes only and should not replace professional medical advice, diagnosis, or treatment.
References
- NIH Genetic and Rare Diseases Information Center (GARD): Cleidocranial dysplasia
- Online Mendelian Inheritance in Man (OMIM): #119600 (Cleidocranial Dysplasia)
- Orphanet: Cleidocranial dysplasia (ORPHA:205)
- Children's Craniofacial Association (CCA)
Posted Feb 12, 2018 by Mariana 300
Posted Feb 12, 2018 by Mariana 300
