RIT1 and Noonan syndrome: Phenotypically, RIT1‐associated Noonan syndrome patients are found to have typical Noonan syndrome facies, milder growth retardation, but higher frequency of cardiac abnormalities when compared to other phenotypes (Calcagni et al., 2016; Cave et al., 2016; Kouz et al., 2016; Yaoita et al., 2016).