Interestingly, this patient showed a severe somatic growth deficiency (BW z-score −2.33 vs. −0.07 ± 1.3 no-SMARCC1 co-mutated IQSEC2 patients, height z-score −1.88 vs. 0.05 ± 1.1, BMI z-score −2.33 vs. −0.17 ± 1.42, and head circumference z-score −2.05 vs. −0.86 ± 1.02). Here, IQSEC2 is linked to Growth delay.