Congenital dislocation of head of radius without associated synostosis between radius and ulna is very rare. Recently we had two cases of this condition.
Case 1; 16 year old boy had deformity and feeling of fatigue around the right elbow joint. He has full range of motion of the joint. However there are clicking noises in the movement at the 90° extension and the 65° flexion of the joint. He has no history of injury to the elbow. Radiographic examination of it showed anterior dislocation of the head of the radius with dome shaping on its upper surface.
Case 2; The mother of this 1 year and 10 month old boy noticed clicking noise in the left elbow when moved. He has no restriction of the joint motion. X-rays showed anterior dislocation of the head of the radius.