Is Paget's Disease hereditary?

Paget's disease of bone is considered a complex, multifactorial disorder rather than a simple hereditary condition, as it involves an interplay between genetic predisposition and environmental factors. While roughly 15–40% of individuals with Paget's disease have a first-degree relative also affected, the inheritance pattern is not straightforward and does not follow classic Mendelian rules.

Is Paget's disease of bone hereditary?

Paget's disease of bone is not inherited in a simple, single-gene fashion. Instead, it is best described as having a strong familial component. Research suggests that while specific genetic variants (such as mutations in the SQSTM1 gene) increase susceptibility, having these variants does not guarantee the development of Paget's disease. Because environmental triggers—such as viral infections in childhood or nutritional factors—are believed to be necessary to trigger the condition, it is classified as a complex multifactorial disease.

What is the risk for children of an affected parent?

The risk for children of a parent with Paget's disease is significantly higher than that of the general population, though exact percentages remain difficult to quantify due to the condition's variable penetrance. If a parent is affected, their children may have a 7 to 10 times higher risk of developing Paget's disease compared to the general public. However, many individuals with a family history never manifest symptoms, and the disease is rarely diagnosed in individuals under the age of 40.

Is genetic testing available for Paget's disease?

Clinical genetic testing for Paget's disease is currently not standard practice. Because the presence of a genetic marker like SQSTM1 does not provide a definitive diagnosis or predict the severity of the disease, testing is primarily reserved for research settings. Genetic counseling may be beneficial for families with a high prevalence of Paget's disease to discuss the following:

• The limitations of current genetic screening.


• The importance of periodic monitoring, such as alkaline phosphatase (ALP) blood tests, for asymptomatic family members.


• The distinction between sporadic and familial forms of the condition.

Next steps

• Consult with a rheumatologist or endocrinologist if you have a family history of Paget's disease.


• Monitor for symptoms such as bone pain, joint stiffness, or skeletal deformities.


• Connect with the 3 community members on DiseaseMaps.org who are currently managing their experience with Paget's disease.

Medical disclaimer: This information is for educational purposes only and does not constitute medical advice, diagnosis, or treatment; always seek the advice of your physician or other qualified health provider with any questions regarding a medical condition.

References

• NIH Genetic and Rare Diseases Information Center (GARD): Paget's disease of bone.


• Orphanet: Paget disease of bone (ORPHA:2803).


• OMIM (Online Mendelian Inheritance in Man): Paget disease of bone 1 (MIM #167250).


• The Paget's Association: Information on genetic research and clinical management.