Among them, them least rare are holoprosencephaly and the forms of craniorrhachischisis, rachischisis and total meningoencephalocele.
Entre ellas, las menos raras son la holoprosencefalia y las formas de craneorraquisquisis, mielosquisis y meningoencefalocele total.
Entre elas, as menos raras são a holoprosencefalia e as formas de craniorraquisquise, mielosquise e meningoencefalocele total.