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The extensor tendon sheaths on the back of the wrist. De Quervain syndrome involves noninflammatory thickening of the tendons and the synovial sheaths that the tendons run through. The two tendons concerned are those of the extensor pollicis brevis and abductor pollicis longus muscles. These two muscles run side by side and function to bring ...
Infectious tenosynovitis is the infection of closed synovial sheaths in the flexor tendons of the fingers. It is usually caused by trauma, but bacteria can spread from other sites of the body. Although tenosynovitis usually affects the flexor tendon of the fingers, the disease can also affect the extensor tendons occasionally. [5]
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 ring finger and thumb are most commonly affected. [1] The problem is generally idiopathic (no known cause). People with diabetes might be relatively prone to trigger finger. [3] The pathophysiology is enlargement of the flexor tendon and the A1 pulley of the tendon sheath.
Pain may be caused after exerting the wrist, as may occur during weight lifting, in any weight-bearing or athletic activity, manual labor, or from injury to nerves, muscles, ligaments, tendons or bones of the wrist. [2] [3] Wrist pain may result from nerve compression, tendonitis, osteoarthritis or carpal tunnel syndrome.
Passing through the first tendon compartment, it inserts to the base of the first metacarpal bone. A part of the tendon reaches the trapezium, while another fuses with the tendons of the extensor pollicis brevis and the abductor pollicis brevis. Except for abducting the hand, it flexes the hand towards the palm and abducts it radially.
Many tendon transfers have been shown to restore opposition to the thumb and provide thumb and finger flexion. In order to have optimal results the individual needs to follow the following principles of tendon transfer: normal tissue equilibrium, movable joints, and a scar-free bed.
Flexor tenosynovitis is a common finding in the patients with Linburg–Comstock syndrome. Another hypothesis is that anatomical variations, which in this case is an additional tendon slip, may act as space-occupying lesions and potentially contribute to carpal tunnel syndrome. [5]