Ectopic posterior pituitary is the result of faulty embryogenesis where the posterior pituitary gland is not seen at the sella. Instead the gland is seen at the level of hypothalamus or floor of third ventricle.

The condition is a cause for pituitary dwarfism.

Many Known associations are seen which can be read at main article : Ectopic posterior pituitary

The main differential diagnosis is hypothalamic lipoma