Radio-ulnar_synostosis_type_2
Radioulnar synostosis
Medical condition
Radioulnar synostosis is a rare condition where there is an abnormal connection between the radius and ulna bones of the forearm.[1] This can be present at birth (congenital), when it is a result of a failure of the bones to form separately, or following an injury (post-traumatic).[2]
It typically causes restricted movement of the forearm, in particular rotation (pronation and supination), though is not usually painful unless it causes subluxation of the radial head.[1] It can be associated with dislocation of the radial head which leads to limited elbow extension.[2]