There is still much difficulty in elucidating the aetiological causes of dwarfism as it presents itself in children. After Erdheim in 1916 attributed dwarfism to a lack of pituitary secretion, it was for many years a common habit to implicate a pituitary deficiency in alJ dwarfs whatever their clinical features. A reaction to this unscientific approach was to be expected, and it has been so ext...