Is Shwachman Diamond Syndrome hereditary?

Shwachman-Diamond Syndrome is a rare hereditary condition, meaning it is passed down through families due to specific genetic changes. It follows an autosomal recessive inheritance pattern, requiring two copies of a mutated gene—one from each parent—for an individual to develop the disease.

Is Shwachman-Diamond Syndrome hereditary?

Yes, Shwachman-Diamond Syndrome is strictly a genetic, hereditary disorder. In the vast majority of cases, it is caused by mutations in the SBDS gene located on chromosome 7. Because it is autosomal recessive, parents of an affected child are typically asymptomatic carriers, each possessing one functional gene and one mutated copy. De novo (spontaneous) mutations are extremely rare in Shwachman-Diamond Syndrome, meaning the condition is almost always inherited from parents who are both carriers.

What is the risk for siblings and future children?

When both parents are carriers of the Shwachman-Diamond Syndrome mutation, the risks for each pregnancy are as follows:

• 25% chance the child will have the disease (inheriting both mutated copies).


• 50% chance the child will be an asymptomatic carrier like the parents.


• 25% chance the child will not have the disease and will not be a carrier.

How is genetic testing used for Shwachman-Diamond Syndrome?

Genetic testing is the gold standard for confirming a diagnosis of Shwachman-Diamond Syndrome. It is recommended for individuals presenting with classic symptoms, such as exocrine pancreatic insufficiency and hematologic abnormalities. For families with a known history of the condition, genetic counseling is vital. Counselors help families understand the recurrence risks and explore options such as carrier testing for extended family members, prenatal diagnosis, or preimplantation genetic testing (PGT) during IVF to ensure the selection of unaffected embryos.

Next steps

• Consult with a clinical geneticist to discuss diagnostic molecular testing.


• Connect with the 14 members currently sharing their experiences with Shwachman-Diamond Syndrome on DiseaseMaps.org.


• Request a referral to a genetic counselor to map out family inheritance patterns and reproductive options.


• Visit the Shwachman-Diamond Syndrome Foundation for disease-specific support resources.

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

References

• NIH Genetic and Rare Diseases Information Center (GARD): Shwachman-Diamond Syndrome.


• Orphanet: Shwachman-Diamond Syndrome (ORPHA:3135).


• OMIM (Online Mendelian Inheritance in Man): Entry #260400.


• Shwachman-Diamond Syndrome Foundation (SDSF).