ZDHHC9-associated neurodevelopmental disorder is a rare syndrome affecting brain development. It is usually inherited within families. It affects males, who inherit the gene difference from their mother. Daughters / sisters may be carriers for the ZDHHC9 gene change, but are unlikely to experience symptoms themselves.

There is a range of learning problems associated with the disorder, and it can be quite different from person to person, even within the same family. For the majority of people who have received this diagnosis, problems are in the “Mild to Moderate” range, which means many people live independently and participate in normal activities.