ZNF407 and neurodevelopmental disorder: In particular, we identified homozygous variants in CCDC88C (NM_001080414.4: c.1126 C > T, p.Arg376Trp) and ZNF407 (NM_017757.3: c.5497 > T, p.Pro1833Ser), two genes previously implicated in neurodevelopmental disorders but associated with phenotypes different than the one found in our proband.