Fasting and post-prandial hyperghrelinemia in Prader-Willi syndrome is partially explained by hypoinsulinemia, and is not due to peptide YY 3-36 deficiency or seen in hypothalamic obesity due to craniopharyngioma. - Goldstone, AP; Pattersen, M; Kalingag, N (J Clin Endocrinol Metab, 2005)