Many individuals with NFNS may be worked up for an NSD prior to the recognition or development of NF1‐like features, resulting in an incorrect or delayed clinical diagnosis, attributable to the reduced expressivity of pathognomonic NF1 features in NFNS individuals or lack of some NF1 features in children under 6 years of age (Gutmann et al., 2017; Tartaglia & Gelb, 2010). The gene discussed is NF1; the disease is neurofibromatosis-Noonan syndrome.