Fracture of the upper portion of the ulna with dislocation of the radial head.
An angulated break in the ulna, which is the longer of the two major bones in the forearm. Angulated breaks cause the bone segments to be at angles to each other and may cause the forearm to have a bent or deformed appearance. Monteggia fractures, although rare, are generally caused by a blow to the forearm or a fall onto the hand. Fractures of the ulna typically occur across the shaft of the bone and may involve a break in the other bone of the forearm, called the radius. Monteggia fracture is diagnosed by physical examination, pain and deformity of the forearm and elbow, and an X ray. Rotation of the forearm or elbow is painful. The forearm may be swollen and appear shortened. Treatment involves manipulating the bone segments into their proper position and immobilizing the forearm, usually with a cast or splint and sling, until the bone has healed in the correct position. Another treatment option is to surgically repair the ulna to promote healing.
A break in the ulna, which is the bone on the inner aspect of the forearm, near the elbow, accompanied by a dislocation of the radius, the bone on the outer side of the forearm, from its position at the elbow joint.