Dislocation of the first carpometacarpal (CMC) is a rare occurrence. CMC joint, because neglected dislocation or incomplete reduction cause chronic instability and painful arthritis. She had tenderness and swelling at the base of thumb.
Typically, patients complain of pain localised to the base of the thumb. In the later stages of the disease when instability and subluxation of the joint occurs.
Arthritis is a condition that irritates or destroys a joint. Although there are several types of arthritis, the one that most often affects the joint at the base of the thumb.