What is the prevalence of Cleidocranial Dysplasia?

Cleidocranial dysplasia (CCD) is a rare genetic condition with an estimated prevalence of approximately 1 in 1,000,000 individuals worldwide. Because cleidocranial dysplasia often presents with mild symptoms that go unrecognized, the true prevalence is likely higher than current clinical estimates suggest.

What is the estimated prevalence of cleidocranial dysplasia?

While exact global numbers are difficult to track, cleidocranial dysplasia is classified as a rare disorder. According to the NIH Genetic and Rare Diseases Information Center (GARD), the prevalence is estimated at 1 per million. However, this figure is widely considered an underestimate because many individuals with mild skeletal or dental manifestations of cleidocranial dysplasia may never seek a formal genetic diagnosis.

Are there demographic differences in cleidocranial dysplasia?

Cleidocranial dysplasia affects males and females with equal frequency, and there is no known predilection for specific ethnic or geographic populations. The condition is a lifelong, congenital disorder, meaning it is present from birth, though it is often diagnosed during childhood when delayed tooth eruption or skeletal differences become more apparent.

Why is accurate data for cleidocranial dysplasia challenging to collect?

Accurate epidemiological data for cleidocranial dysplasia remains a challenge for several reasons:

• Variable Expressivity: Symptoms range from subtle dental crowding to significant skeletal abnormalities, leading to underdiagnosis in mild cases.


• Diagnostic Gaps: Patients may be treated for individual symptoms—such as dental issues—without a clinical geneticist identifying the underlying cleidocranial dysplasia.


• Community Perspectives: At DiseaseMaps.org, 89 people with cleidocranial dysplasia have connected to share their experiences, providing vital real-world data that complements formal clinical literature.

Next steps

• Consult with a clinical geneticist to confirm a diagnosis through molecular testing of the RUNX2 gene.


• Schedule a consultation with a specialized craniofacial orthodontist to manage dental development.


• Join the DiseaseMaps.org community to connect with other patients and caregivers navigating the complexities of cleidocranial dysplasia.

Medical disclaimer: This content is for informational purposes only and does not constitute professional medical advice, diagnosis, or treatment.

References

• NIH Genetic and Rare Diseases Information Center (GARD): Cleidocranial dysplasia overview.


• Orphanet: Rare disease database entry for cleidocranial dysplasia (ORPHA:205).


• OMIM (Online Mendelian Inheritance in Man): Entry #119600 (Cleidocranial Dysplasia).


• Cleidocranial Dysplasia Foundation: Patient advocacy and clinical resource portal.