A deformed sucker cluster on an arm of an octopus

A deformity, dysmorphism, or dysmorphic feature is a major difference in the shape of body part or organ ompared to the average shape of that part. Deformity may arise from numerous causes:

• A genetic mutation
• Damage to the fetus or uterus
• Complications at birth
• A growth or hormone disorder
• Reconstructive surgery following a severe injury e.g. burn injury.
• Arthritis and other Rheumatoid disorders

Irish Mythology includes the Fomorians, who are almost without exception described as being deformed, possessing only one of what most have two of (eyes, arms, legs, etc.) or having larger than normal limbs. Other mythological creatures may have been created due to a deformative syndrome also, for instance, descriptions of mermaids may be related to the symptoms of sirenomelia.

Deformity can occur in non-humans, as well. Frogs can be mutated due to Ribeiroia (Trematoda) infection.

In many cases in which a major deformity is present at birth, it is the result of an underlying condition severe enough that the baby does not survive very long. In some societies, defective babies are abandoned at birth: some are saved by the "kindness of strangers."(See John Boswell.)

See also

• Teratology
• Body dysmorphic disorder

de:Deformität es:Deformidad ja:?? pl:Deformacja (medycyna) scn:Sfrinzia