 Thanatophoric dysplasia, so named because of its lethality at birth, is the most common lethal congenital skeletal dysplasia with an estimated prevalence of one in 6,400 to one in 16,700 births.Its name "Thanatophoros", means "death-bearing" in Greek.Euthanasia, "good death" in Greek, is the act or practice of ending the life of an individual who would otherwise experience severe, incurable suffering or disability.