The genetic cause



About 22% of Dravet syndrome patients are mutation-free regarding already identified genes.

Around 78% of Dravet syndrome patients have a genetic mutation that appears to cause the associated disease.

In most cases this genetic disorder is the result of a “de novo” mutation (meaning that parents did not pass on the mutated gene). Usually there is no significant chance that other children will have Dravet syndrome.

Despite this fact, it is recommended that genetic testing be carried out, if the tests are available in your country because in some rare cases siblings may also be affected. Genetic counsellingAn educational counselling process for individuals and families who have a genetic disease or may be at risk for a disease to facilitate informed decision-making. should help you to understand the risk if you hope to have more children.