Finkelstein's test is used to diagnose DeQuervain's tenosynovitis in people who have wrist pain. To perform the test, the examining physician grasps the thumb and the hand is ulnar deviated sharply, as shown in the image. If sharp pain occurs along the distal radius (top of forearm, close to wrist; see image), DeQuervain's tenosynovitis is likely.
Some other doctors ask their patients to flex their thumb and clench their fist over the thumb followed by ulnar deviation for Finkelstein's test.
Finkelstein's test is one way to determine if there is tenosynovitis in the abductor pollicis longus and extensor pollicis brevis tendons of the wrist. These two tendons belong to the first dorsal compartment.
- First dorsal compartment: abductor pollicis longus and extensor pollicis brevis.
- Second dorsal compartment: extensor carpi radialis longus and extensor carpi radialis brevis.
- Third dorsal compartment: extensor pollicis longus.
- Fourth dorsal compartment: extensor digitorum and extensor indicis.
- Fifth dorsal compartment: extensor digiti minimi.
- Sixth dorsal compartment: extensor carpi ulnaris.
Finkelstein's test was described by Harry Finkelstein (1865-1939), an American surgeon, in 1930. A similar test was previously described by Eichoff, in which the thumb is placed in the palm of the hand and held with the fingers, and the hand is then ulnar deviated (see second image), causing intense pain over the radial styloid which disappears if the thumb is released. This test produces more false positive results than the test described by Finkelstein.
The patient, either sitting or standing, forms a fist around the thumb. The examiner stabilizes the forearm while holding the patient’s fist with their other hand. The examiner then moves the wrist into ulnar deviation. If there is an increased pain in the radial styloid process and along the length of the extensor pollicis brevis and abductor pollicis longus tendons, then the test is positive for De Quervain’s syndrome.
Special Considerations/implications 
Because this test may create pain in other tissues to come back a false positive or may come back negative though de Quervain’s or katherines syndrome is still suspected, the patient can radially deviate against resistance to possibly reproduce pain.
Konin, Jeff G., Denise L. Wiksten, Jerome A. Isear, and Holly Brader. Special Tests for Orthopedic Examination. 3rd ed. Thorofare, NJ: SLACK Incorporated. 2006. 113-114. Print.
Starkey, Chad, Sara D. Brown, and Jefferey L. Ryan. Orthopedic and Athletic Injury Evaluation Handbook. Philadelphia: F.A. Davis. 2010. 524. Print.
- Finkelstein, H., (1930): Stenosing tenosynovinitis at the radial styloid process. The Journal of Bone and Joint Surgery, 1930, 12: 509-540.
- Finkelstein's test at Who Named It?
- Ahuja NK, Chung KC (November 2004). "Fritz de Quervain, MD (1868-1940): stenosing tendovaginitis at the radial styloid process". J Hand Surg [Am] 29 (6): 1164–70. doi:10.1016/j.jhsa.2004.05.019. PMID 15576233. Retrieved 2009-04-14. Full text