PTPA and neurodevelopmental disorder: First reported in 2015–2019 (Fitzgerald et al., 2015; Houge et al., 2015; Reynhout et al., 2019), PP2A-related neurodevelopmental disorders (NDDs) represent a family of rare (neuro)developmental disorders, of which the clinical and molecular spectrum is still likely incomplete, and new diagnoses and variants are likely to further emerge in the near future.