A person without arms is known as a bilateral amputee.
However some people are born without arms they are usually suffering from a condition known as a rare genetic syndrome called Tetra Amelia.
Tetra-amelia syndrome is a very rare disorder characterized by the absence of all four limbs.
This syndrome can also cause severe malformations of other parts of the body, including the face and head, heart, nervous system, skeleton, and genitalia.
Tetraamelia - multiple malformations is an extremely rare mostly lethal congenital disorder characterized by absence of all four limbs and frequent associated major malformations involving the head, face, eyes, skeleton, heart, lungs, anus, urogenital, and central nervous systems.
In other affected families, the cause of tetra-amelia syndrome has not been determined.
Researchers believe that unidentified mutations in WNT3 or other genes involved in limb development are probably responsible for the disorder in these cases.
A person who is missing or has had amputated both arms or both legs.
For example, a person that is missing both legs below-the knee is considered a bilateral BK.