What is the prevalence of Kenny-Caffey Syndrome?

Kenny-Caffey Syndrome is an ultra-rare genetic disorder with fewer than 100 cases documented in medical literature globally, making it difficult to establish precise prevalence or incidence rates. Because the condition is so rare, it is likely significantly underdiagnosed or misdiagnosed, particularly in milder presentations.

Is Kenny-Caffey Syndrome considered rare or common?

Kenny-Caffey Syndrome is classified as an ultra-rare condition. Due to its extreme scarcity, there are no reliable epidemiological statistics for its exact incidence or prevalence in the general population. While the DiseaseMaps.org community currently supports 4 individuals living with Kenny-Caffey Syndrome, these real-world data points highlight how patients often find each other across global borders due to the lack of local clinical expertise.

Are there gender, age, or ethnic differences in Kenny-Caffey Syndrome?

Kenny-Caffey Syndrome affects both males and females equally. The condition is primarily diagnosed in infancy or early childhood due to characteristic features such as growth retardation, hypocalcemia, and distinctive skeletal findings. Because the syndrome is genetic, the onset is present at birth, though the severity of symptoms can fluctuate throughout a patient's life. Currently, there is no evidence suggesting that Kenny-Caffey Syndrome is linked to any specific geographic region or ethnic group.

What factors make identifying Kenny-Caffey Syndrome challenging?

Accurate data collection for Kenny-Caffey Syndrome is hindered by several clinical challenges:

• Underdiagnosis: Mild cases of Kenny-Caffey Syndrome may go unrecognized if the skeletal or metabolic features are subtle.


• Genetic Heterogeneity: The condition is associated with mutations in the FAM111A gene (Type 2) and TBCE gene (Type 1), which can lead to overlapping clinical features with other syndromes.


• Diagnostic Delays: Patients with Kenny-Caffey Syndrome often undergo extensive testing for metabolic or developmental issues before receiving a definitive genetic diagnosis.

Next steps

• Consult with a clinical geneticist to discuss genetic testing if you suspect a diagnosis of Kenny-Caffey Syndrome.


• Connect with the community at DiseaseMaps.org to share experiences with other families affected by Kenny-Caffey Syndrome.


• Request a referral to a metabolic specialist to manage the hypocalcemia and parathyroid issues associated with the condition.

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

References

• Orphanet: Kenny-Caffey syndrome (ORPHA:2311)


• NIH Genetic and Rare Diseases Information Center (GARD): Kenny-Caffey syndrome


• OMIM (Online Mendelian Inheritance in Man): Kenny-Caffey syndrome, type 1 and type 2