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Finkelstein’s test and the Grind Test



- Finkelstein's test:
    - ask patient to make a fist over his thumb, and ulnarly deviating wrist
    - sharp pain at this site is produced by active extension and abduction of the thumb against resistance;
- Differential Diagnosis:
     - DeQuervain's tenosynovitis must be differentiated from degenerative arthritis & trapeziometacarpal joint;
     - test to differentiate the two is the Grind test which will usually be negative in DeQuervain's but positive in degenerative arthritis;

- Grind Test:
     - it is performed by holding thumb proximal phalanx & MCPJ in examiner's hands & forcefully pushing against trapeziometacarpal joint, while also rotating it slightly, to cause grinding motion



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