The gold standard test for de Quervain’s tenosynovitis is Finkelstein’s test, a simple physical exam your doctor performs in the office by manipulating your thumb and wrist to reproduce the pain you feel along the thumb side of your wrist. In most cases, no imaging or lab work is needed. The test has a sensitivity of 84% and specificity of 96%, meaning it catches most true cases while rarely flagging a false one.
How Finkelstein’s Test Works
Your provider will have you rest your forearm on the edge of an exam table with your hand hanging off the side, pinky-side down. From there, the test follows a staged approach designed to minimize unnecessary pain and reduce false positives.
In the first stage, you simply let gravity pull your hand downward into a gentle sideways tilt away from the thumb. If that alone triggers sharp pain at the bony bump on the thumb side of your wrist (the radial styloid), the test is positive. This version works well when symptoms are acute and the area is already very tender.
If that doesn’t reproduce your pain, the examiner gently pushes your hand further in the same direction, adding a passive stretch across the tendons on the thumb side. Again, pain at the radial styloid means a positive result.
If neither of those steps hurts, the examiner moves to the original technique Finkelstein described: grasping your thumb and passively folding it down into your palm. This creates the most stretch on the two tendons that run through the first dorsal compartment of your wrist, the ones responsible for extending and pulling your thumb away from your hand. Increasing pain at the radial styloid confirms the diagnosis. This third stage is typically reserved for chronic cases where the tendons aren’t inflamed enough to react to lighter provocation.
Eichhoff’s Test: The Version You’ll See Most Often
There’s a good chance you’ve already seen the test described differently online: make a fist with your thumb tucked inside, then tilt your wrist away from the thumb. That maneuver is actually Eichhoff’s test, not Finkelstein’s, though the two names are constantly confused in clinical practice and even in medical textbooks.
Eichhoff’s test is more provocative. It stretches not just the thumb tendons but also surrounding structures, which means it can produce pain even in people who don’t have de Quervain’s. A study published in the Journal of Hand and Microsurgery found that Finkelstein’s test had a specificity of 100% compared to 89% for Eichhoff’s. That 11% gap represents people who would be told they might have de Quervain’s when they don’t. For this reason, the staged Finkelstein’s approach is preferred.
The WHAT Test
A newer clinical exam called the WHAT test (wrist hyperflexion and abduction of the thumb) has shown promise as an alternative. Instead of tilting the wrist sideways, you bend your wrist fully forward while the examiner pulls your thumb away from your hand. A three-year study of 100 patients found the WHAT test had a sensitivity of 99%, meaning it missed almost no true cases. It also outperformed Eichhoff’s test in specificity.
One unique advantage: the WHAT test can also detect instability in the tendon compartment after surgical release, making it useful for follow-up care. It’s not yet as widely adopted as Finkelstein’s test, but it’s gaining traction as a diagnostic tool, particularly for catching early-stage disease.
When Imaging Is Used
Most people with de Quervain’s are diagnosed entirely through a physical exam and a review of their daily activities. Your doctor will press along the thumb side of your wrist to check for swelling and pinpoint tenderness, ask about repetitive hand motions at work or home, and perform one of the tests above. That’s usually enough.
Ultrasound comes into play when the diagnosis is uncertain or when the provider needs to see exactly what’s happening inside the tendon compartment. On ultrasound, de Quervain’s shows up as thickening of the tendon sheath and the tendons themselves, particularly the one that extends the thumb at the knuckle joint. The area may also show fluid accumulation around the tendon. Ultrasound picks up abnormalities with a sensitivity of 93%, making it a reliable backup when the physical exam is ambiguous.
Ultrasound can also reveal an important anatomical detail: whether the tendon compartment is divided by an internal wall (a septum). About 89% of people with de Quervain’s have this divided compartment, compared to 71% of people without the condition. This isn’t something you’d notice or feel, but it matters for treatment planning. A divided compartment can make cortisone injections less effective if the medication only reaches one side, and surgeons need to know about it before performing a release procedure.
X-rays are occasionally ordered, but mainly to rule out other causes of wrist pain like fractures or arthritis rather than to diagnose de Quervain’s directly.
What the Pain Feels Like
De Quervain’s produces pain concentrated at the base of your thumb where it meets the wrist, specifically over the bony prominence on the thumb side. The pain often radiates up into the forearm. It’s typically worse with gripping, twisting motions (like wringing out a towel), or any movement that forces the thumb away from the hand. Many people notice it most when lifting a child, turning a doorknob, or scrolling on a phone.
The physical tests work by reproducing exactly this kind of stress. They stretch the two tendons that run through a narrow tunnel over the radial styloid, and when those tendons or their surrounding sheath are inflamed and swollen, the added tension triggers recognizable pain. If the pain during testing matches what you feel during daily activities and it’s located precisely at the radial styloid, the diagnosis is straightforward.