Is Chronic Granulomatous Disease hereditary?

Chronic Granulomatous Disease (CGD) is an inherited genetic disorder caused by mutations in genes responsible for the NADPH oxidase enzyme complex, which prevents immune cells from effectively killing certain bacteria and fungi. While it is always genetic, the inheritance pattern depends on the specific gene affected, with both X-linked and autosomal recessive forms existing.

Is Chronic Granulomatous Disease hereditary?

Yes, Chronic Granulomatous Disease is a hereditary condition, meaning it is passed from parents to children through DNA. It is not contagious and cannot be acquired later in life. Because it is caused by mutations in specific genes, understanding the inheritance pattern is crucial for family planning and identifying other at-risk relatives.

What are the inheritance patterns of Chronic Granulomatous Disease?

The inheritance of Chronic Granulomatous Disease depends on which gene is mutated:

• X-linked Recessive (approx. 65-70% of cases): The mutation occurs on the X chromosome. It primarily affects males, while females are typically asymptomatic carriers.


• Autosomal Recessive (approx. 30-35% of cases): The mutation occurs on non-sex chromosomes. Both parents must be carriers for a child to inherit the condition, resulting in a 25% risk for each pregnancy.

How are genetic testing and counseling utilized?

Genetic testing is the gold standard for confirming a diagnosis of Chronic Granulomatous Disease and identifying the specific genetic mutation. We recommend genetic counseling for all families affected by Chronic Granulomatous Disease to discuss the recurrence risk and family planning options, including preimplantation genetic testing (PGT) or prenatal diagnosis. While de novo (spontaneous) mutations can occur in Chronic Granulomatous Disease, they are relatively rare compared to inherited cases.

Next steps

• Consult with a clinical geneticist to confirm the specific mutation involved in your family.


• Connect with the 60 members currently sharing their experiences with Chronic Granulomatous Disease on DiseaseMaps.org.


• Speak with an immunologist specializing in primary immunodeficiencies regarding long-term management.


• Explore resources from the Immune Deficiency Foundation for support and clinical trial information.

Medical disclaimer: This information is for educational purposes only and does not replace professional medical advice, diagnosis, or treatment; always seek the advice of your physician regarding a medical condition.

References

• NIH Genetic and Rare Diseases Information Center (GARD): Chronic Granulomatous Disease


• Orphanet: Chronic Granulomatous Disease (ORPHA:213)


• Online Mendelian Inheritance in Man (OMIM): #306400 (X-linked CGD)


• Immune Deficiency Foundation (IDF): Understanding CGD