Between five and 10 patients had juvenile neuronal ceroid lipofuscinosis (JNCL), PTRHD1, RAB39B, X‐linked parkinsonism with spasticity, Alexander disease, dopa‐responsive dystonia‐parkinsonism (NR4A2), Fragile‐X syndrome or spastic paraplegia type 15 (SPG15). This evidence concerns the gene NR4A2 and juvenile neuronal ceroid lipofuscinosis.