How do I know if I have Russell Silver Syndrome?

Russell Silver Syndrome (RSS) is a rare genetic disorder typically characterized by intrauterine growth restriction, low birth weight, and short stature that persists into adulthood. Diagnosis is confirmed through specialized genetic testing, as clinical features vary significantly among the 263 members of our DiseaseMaps community and the broader patient population.

What are the primary indicators of Russell Silver Syndrome?

The hallmark of Russell Silver Syndrome is growth failure that begins before birth. Many individuals with Russell Silver Syndrome exhibit a distinct facial appearance, including a triangular face, a prominent forehead (frontal bossing), and a small, pointed chin. Other clinical indicators often include body asymmetry (one side of the body growing more slowly than the other) and persistent feeding difficulties during infancy.

How is Russell Silver Syndrome diagnosed?

Diagnosis is a multi-step process involving clinical evaluation and molecular genetic testing. Physicians look for specific patterns to confirm a Russell Silver Syndrome diagnosis, including:

• Severe intrauterine growth restriction (birth weight at least 2 standard deviations below the mean).


• Postnatal growth failure (height at least 2 standard deviations below the mean).


• Relative macrocephaly at birth (head circumference is large relative to body size).


• Body asymmetry or hemihypertrophy.


• Specific epigenetic changes, such as hypomethylation of the H19/IGF2 imprinting control region on chromosome 11p15 (found in about 50% of cases).

When should I consult a specialist?

If you suspect you or your child may have Russell Silver Syndrome, you should consult a clinical geneticist or a pediatric endocrinologist. When speaking with your doctor, provide a detailed medical history, including birth weight, growth charts, and any documented developmental delays. If your concerns are dismissed, request a referral to a center of excellence specializing in growth disorders or rare genetic syndromes.

What is the difference between normal variation and symptoms?

While many people have minor body asymmetry or short stature, Russell Silver Syndrome is defined by a constellation of specific physical traits combined with confirmed genetic or epigenetic markers. Unlike standard growth variations, Russell Silver Syndrome involves distinct metabolic and growth-related challenges that require specialized medical management.

Next steps

• Request a referral to a clinical geneticist for methylation analysis.


• Track longitudinal growth data to present to your endocrinologist.


• Connect with the 263 members at DiseaseMaps.org to share experiences and find support.

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

References

• NIH Genetic and Rare Diseases Information Center (GARD): Russell Silver Syndrome.


• Orphanet: Silver-Russell Syndrome (ORPHA:814).


• OMIM (Online Mendelian Inheritance in Man): Silver-Russell Syndrome (180860).


• The MAGIC Foundation: Russell Silver Syndrome patient resources.