Is Central Core Disease hereditary?

Central Core Disease is a genetic, hereditary condition primarily caused by mutations in the RYR1 gene. It follows an autosomal dominant inheritance pattern, meaning an affected individual has a 50% chance of passing the condition to each of their children, though de novo (spontaneous) mutations can also occur.

Is Central Core Disease hereditary?

Yes, Central Core Disease is a hereditary condition, meaning it is caused by changes (mutations) in DNA that can be passed from parents to children. It is specifically a genetic disorder of the skeletal muscle. While most cases are inherited in an autosomal dominant pattern, Central Core Disease can also arise from a de novo mutation, which occurs spontaneously in the affected individual without a family history of the disorder.

What is the inheritance pattern of Central Core Disease?

The vast majority of Central Core Disease cases are inherited through an autosomal dominant pattern. This implies that only one copy of the mutated RYR1 gene is required to manifest the disease. In rare instances, recessive inheritance patterns have been observed, but these are atypical for this condition. Because Central Core Disease is primarily dominant, the risk to offspring is significant:

• 50% risk: If one parent carries the mutation, there is a 50% chance for each child to inherit the specific genetic variant.


• De novo occurrence: Many patients are the first in their family to be affected, representing a new mutation that occurred during the formation of reproductive cells or early embryonic development.

How is genetic testing and counseling utilized?

Genetic testing for Central Core Disease involves sequencing the RYR1 gene to identify pathogenic variants. This testing is crucial not only for confirming a diagnosis but also for identifying the specific mutation to guide family planning. Genetic counseling is highly recommended for families affected by Central Core Disease to discuss:

• The likelihood of passing the condition to future children.


• Prenatal diagnosis options, such as chorionic villus sampling (CVS) or amniocentesis.


• The identification of family members who may be at risk for Malignant Hyperthermia, a life-threatening reaction to certain anesthesia often associated with Central Core Disease.

Next steps

• Consult with a board-certified clinical geneticist to discuss RYR1 testing.


• Review your family history to determine if other relatives exhibit signs of muscle weakness or sensitivity to anesthesia.


• Connect with the 89 members of the DiseaseMaps.org community to share experiences and find support.


• Ensure all medical records clearly indicate a diagnosis of Central Core Disease to alert anesthesiologists of potential anesthesia risks.

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 or other qualified health provider with any questions regarding a medical condition.

References

• NIH Genetic and Rare Diseases Information Center (GARD): Central Core Disease


• Orphanet: Central Core Disease (ORPHA:207)


• OMIM (Online Mendelian Inheritance in Man): #117000 Central Core Disease of Muscle


• RYR1 Foundation: Understanding the Genetics of RYR1-Related Myopathies