What is deQuervain's tendonitis?
First dorsal compartment tendonitis, more commonly known as de
Quervain’s tendonitis or tenosynovitis after the Swiss surgeon
Fritz de Quervain, is a condition brought on by irritation or
inflammation of the wrist tendons at the base of the thumb. The inflammation causes the compartment (a tunnel or a sheath)
around the tendon to swell and enlarge, making thumb and wrist movement
painful. Making a fist, grasping or holding objects—often
infants—are common painful movements with de Quervain’s
tendonitis.
What causes deQuervain's tendonitis?
The cause of de Quervain’s tendonitis is an irritation of the
tendons at the base of the thumb, usually caused by taking up a new,
repetitive activity. New mothers are especially prone to this type of
tendonitis: caring for an infant often creates awkward hand positioning,
and hormonal fluctuations associated with pregnancy and nursing further
contribute to its occurrence. A wrist fracture can also predispose a
patient to de Quervain’s tendonitis, because of increased stresses
across the tendons.
Signs and symptoms of deQuervain's tendonitis
Pain over the thumb-side of the wrist is the main symptom. The pain
may appear either gradually or suddenly, and pain is located at the
first dorsal compartment at the wrist. Pain may
radiate down the thumb or up the forearm. Hand and thumb motion
increases pain, especially with forceful grasping or twisting. Swelling
over the base of the thumb may include a fluid-filled cyst in this
region. There may be an occasional “catching” or
“snapping” when moving the thumb. Because of the pain and
swelling, motion such as pinching may be difficult. Irritation of the
nerve lying on top of the tendon sheath may cause numbness on the back
of the thumb and index finger.
Diagnosis of deQuervain's tendonitis
Tenderness directly over the tendons on the thumb-side of the wrist
is the most common finding. A test is generally performed in which the
patient makes a fist with the fingers clasped over the thumb. The wrist
is then bent in the direction of the little finger.
This maneuver can be quite painful for the person with de
Quervain’s tendonitis.
Treatment of deQuervain's tendonitis
The goal is to relieve the pain caused by the irritation and
swelling. Your doctor may recommend resting the thumb and wrist by
wearing a splint. Oral anti-inflammatory medication may be recommended.
A cortisone-type of steroid may be injected into the tendon compartment
as another treatment option. Each of these non-operative treatments help
reduce the swelling, which typically relieves pain over time. In some
cases, simply stopping the aggravating activities may allow the symptoms
to go away on their own.
When symptoms are severe or do not improve, surgery may be
recommended. The surgery opens the compartment to make more room for the
inflamed tendons, which breaks the vicious cycle where the tight space
causes more inflammation. Normal use of the hand can usually be resumed
once comfort and strength have returned. Your hand surgeon will advise the best treatment for your situation.