Short answer · Medically reviewed summary · Last updated: 2026-05-08
Russell Silver Syndrome is typically a genetic condition, but it is rarely inherited from parents; instead, it most often occurs as a de novo (spontaneous) event. While it is a genetic disorder involving epigenetic changes, it is not passed down in a classic Mendelian inheritance pattern, meaning the recurrence risk for siblings of an affected individual is generally very low. Is Russell Silver Syndrome hereditary? In the vast majority of cases, Russell Silver Syndrome is not considered hereditary.
2 people with Russell Silver Syndrome have shared their first-person experience on this question at DiseaseMaps.
Is Russell Silver Syndrome hereditary?
Is Russell Silver Syndrome hereditary? The genetic component explained in plain language, reviewed against medical sources, with patient experiences.
Russell Silver Syndrome is typically a genetic condition, but it is rarely inherited from parents; instead, it most often occurs as a de novo (spontaneous) event. While it is a genetic disorder involving epigenetic changes, it is not passed down in a classic Mendelian inheritance pattern, meaning the recurrence risk for siblings of an affected individual is generally very low.
Is Russell Silver Syndrome hereditary?
In the vast majority of cases, Russell Silver Syndrome is not considered hereditary. Most individuals diagnosed with Russell Silver Syndrome have no family history of the condition. Because it is usually caused by sporadic epigenetic changes during early development, the likelihood of a parent having another child with the condition is typically less than 1%. However, in rare instances where a specific chromosomal rearrangement is identified in a parent, the risk of recurrence can be higher, necessitating formal genetic evaluation.
What causes the genetic changes in Russell Silver Syndrome?
Russell Silver Syndrome is a complex imprinting disorder. The genetic mechanisms often involve the following:
- Loss of methylation on chromosome 11p15: Occurs in approximately 30–50% of Russell Silver Syndrome cases.
- Maternal uniparental disomy of chromosome 7 (mUPD7): Found in about 5–10% of cases.
- De novo mutations: Most cases arise spontaneously, meaning the genetic change occurs for the first time in the affected individual.
How is genetic testing used for diagnosis?
Genetic testing for Russell Silver Syndrome is highly recommended when clinical features, such as severe intrauterine growth restriction and postnatal growth failure, are present. Testing typically involves methylation-specific studies and chromosomal microarray analysis. Because Russell Silver Syndrome is clinically heterogeneous, genetic counseling is vital to help families interpret complex molecular results and understand the specific mechanism behind their diagnosis.
Next steps
- Consult a clinical geneticist to discuss whether molecular testing is appropriate for your family.
- Connect with the 263 members of the Russell Silver Syndrome community on DiseaseMaps.org to share experiences.
- Request a referral to a genetic counselor if you are planning a pregnancy and have a family history of growth disorders.
Medical disclaimer: This content is for informational 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): Russell Silver Syndrome
- Orphanet: Silver-Russell syndrome
- OMIM (Online Mendelian Inheritance in Man): Silver-Russell Syndrome
- MAGIC Foundation: Russell Silver Syndrome resources
I know of twins, one has RSS and the other doesnt, and also families who have one child with RSS and gone on to have another child, who doesnt have it. So its just rare, and sporadic
Posted Aug 21, 2017 by Scarlett 2100
Posted Aug 21, 2017 by Clare 900
