My oldest child has narcolepsy. Do I need to be worried that my toddler will have it too?

My oldest child has narcolepsy. Do I need to be worried that my toddler will have it too?

First degree relatives of people who have narcolepsy only have a 1-2% risk of developing narcolepsy. A first degree relative is a person’s child, sibling (brother or sister), or parent. In addition, familial narcolepsy accounts for only 10% of those with narcolepsy. The rest of the time, about 90%, it is sporadic. In other words, most cases of narcolepsy occur when no one else in the family has it.