The highest percentage of positive diagnoses (48%) was observed in patients with developmental and epileptic encephalopathy (DEE), with variants identified in genes including <i>ALG13</i>, <i>ATP1A2</i>, <i>CACNA1A</i>, <i>CDKL5</i>, <i>CHD2</i>, <i>GABRG2</i>, <i>ITPA</i>, <i>KCNQ2</i>, <i>PCDH19</i>, <i>SCN1A</i>, <i>SCN2A</i>, <i>SCN3A</i>, <i>SCN8A</i>, <i>SMC1A</i>, <i>SPTAN1</i>, <i>STXBP1</i>, and <i>UBA5</i>. This evidence concerns the gene PCDH19 and developmental and epileptic encephalopathy.