Editing Dwarfism (section)

===Classification===
[[File:Lavinia Warren - Brady-Handy.jpg|thumb|upright|[[Lavinia Warren]], an actress with [[pituitary dwarfism]] (growth hormone deficiency)]]
In men and women, the sole requirement for being considered a dwarf is having an adult height under {{cvt|147|cm|ftin}} and it is almost always sub-classified with respect to the underlying condition that is the cause of the short stature. Dwarfism is usually caused by a genetic variant; achondroplasia is caused by a mutation on [[chromosome 4]]. If dwarfism is caused by a medical disorder, the person is referred to by the underlying diagnosed disorder. Disorders causing dwarfism are often classified by proportionality. Disproportionate dwarfism describes disorders that cause unusual proportions of the body parts, while proportionate dwarfism results in a generally uniform stunting of the body.

Disorders that cause dwarfism may be classified according to one of hundreds of names, which are usually permutations of the following roots:
* location
** [[Rhizomelia|rhizomelic]] = root, i.e., bones of the upper arm or thigh
** [[Mesomelia|mesomelic]] = middle, i.e., bones of the forearm or lower leg
** acromelic = end, i.e., bones of hands and feet.
** micromelic = entire limbs are shortened
* source
** chondro = of cartilage
** osteo = of bone
** spondylo = of the vertebrae
** plasia = form
** trophy = growth

Examples include achondroplasia and [[chondrodystrophy]].