FOXJ1 and congenital non-communicating hydrocephalus: Although de novo heterozygous FOXJ1 mutation is associated with congenital obstructive hydrocephalus in humans (Jin et al. 2020; Wallmeier et al. 2019; Shapiro et al. 2021), mice with heterozygous Foxj1 mutations did not display the domed head and perinatal death that is frequently associated with congenital obstructive hydrocephalus in mice.