Deformation of the wrist «lunch fork» is caused by dorsal displacement of the wrist bones (Collet fracture).
A wrist fracture is a rupture in the part of the radial bone that is close to the wrist. Symptoms include pain, bruises and rapidly occurring swelling.
In young people, these fractures usually occur during sports or when colliding with a car. In the elderly, the most common reason is a fall on an outstretched hand.