Nonhormonal dwarfism happens if a disease or severely impaired nourishment blunts the growth of cartilage cells. For example, a disease of the bowl or kidneys can interfere with growth. A physician should be contacted if a child seems to be growing too slowly to see if the childs growth is normal.
Jesse Roth, Dwarf, World Book Online Americas Edition,
http://www.worldbookonline.com/ar?/na/ar/co/ar170740.htm, November 24, 2002