De Quervain's disease has different clinical features. Different tests have been 
described in the past, the most popular test being the Eichhoff's test, often 
wrongly named as the Finkelstein's test. Over the years, a misinterpretation has 
occurred between these two tests, the latter being confused with the first. To 
compare the Eichhoff's test with a new test, the wrist hyperflexion and 
abduction of the thumb test, we set up a prospective study over a period of 
three years for a cohort of 100 patients (88 women, 12 men) presenting 
spontaneous pain over the radial side of the styloid of the radius (de Quervain 
tendinopathy). The purpose of the study was to compare the accuracy of the 
Eichhoff's test and wrist hyperflexion and abduction of the thumb test to 
diagnose correctly de Quervain's disease by comparing clinical findings using 
those tests with the results on ultrasound. The wrist hyperflexion and abduction 
of the thumb test revealed greater sensitivity (0.99) and an improved 
specificity (0.29) together with a slightly better positive predictive value 
(0.95) and an improved negative predictive value (0.67). Moreover, the study 
showed us that the wrist hyperflexion and abduction of the thumb test is very 
valuable in diagnosing dynamic instability after successful decompression of the 
first extensor compartment. Our results support that the wrist hyperflexion and 
abduction of the thumb test is a more precise tool for the diagnosis of de 
Quervain's disease than the Eichhoff's test and thus could be adopted to guide 
clinical diagnosis in the early stages of de Quervain's tendinopathy.