Any of the dorsal compartments of the wrist can develop
tenosynovial inflammation. The first compartment is the most frequently affected site, called
De Quervain's disease (syndrome or tenosynovitis). The other two most commonly injured are the sixth (extensor carpi ulnaris) and second (
intersection syndrome) compartments. The first compartment is the site where entrapment tendinitis, better known as De Quervain's disease, occurs. Repetitive trauma is believed to cause thickening of the tendons, which lead to movement restriction of the tendons through the compartment. Any movement of the thumb and wrist causes the patient pain, inflammation and swelling. The presence of anomalous or variant muscles in the fourth compartment may result in chronic dorsal wrist pain, a condition known as the fourth compartment syndrome. Intersection syndrome can be caused by direct trauma to the second extensor compartment. It is however commonly brought on by activities that require repetitive wrist
flexion and extension. Weightlifters, rowers, and other athletes are particularly prone to this condition. The patient presents with pain over dorsal aspect of the forearm and wrist. The tendon of 6th compartment (extensor carpi ulnaris) can suffer recurrent dislocation due to a tear of the ulnar side of the compartment. Those that engage in racket sports and golf seem to be at the highest risk for this condition. ==Additional images==