Of importance, total SCN volume was comparable between PWS and control subjects (AVP‐ir volume estimation 1.455 ± 0.999 vs. 1.128 ± 0.8493, p value = .6576; VIP‐ir volume estimation 0.555 ± 0.3252 vs. 0.5100 ± 0.4290, p value = .7673—values in mm3). The gene discussed is VIP; the disease is Prader-Willi syndrome.