A dislocation of the head of the radius from its socket in the elbow joint. The phenotype is HP_0003083 (Dislocated radial head). Also known as: Congenital radial head dislocation, Dislocated radius, Dislocation of radial head, Dislocation of the radial head, Radial dislocation, Radial head dislocation, Radial head dislocation/subluxation.