Pallister–Hall syndrome
[2] The syndrome was originally described by American and Canadian geneticists Philip Pallister and Judith Hall in their research of newborn deaths due to pituitary failure.[3] Subsequent discovery of living children and adults expanded the understanding of the syndrome and established the transmission pattern within families.[8] Before birth the GLI3 gene delivers directions for protein creation that turns on or off development of cells that produce organs and tissues.Central characteristics of the disorder include polydactyly (extra digits on limbs) with possible cutaneous syndactyly (fusion or webbed skin between some fingers or toes) and a hypothalamic hamartoma, a rare brain lesion on the hypothalamus that is present at birth.Parents and medical practitioners should monitor for signs of endocrine disruption in sleep, eating, or hormonal issues, such as precocious puberty caused by the hypothalamic hamartoma.