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Cozen's test - Tennis Elbow Test

Cozen's test is performed to evaluate for lateral epicondylitis or, tennis elbow.

The patient’s elbow is stabilized by the therapists thumb, which rests on the patient’s lateral epicondyle. The patient is then asked to actively make a fist, pronate the forearm, and radially deviate and extend the wrist while the therapist resists the motion. A  sudden severe pain in the area of the lateral epicondyle of the humerus is a positive sign.

The epicondyle can be palpated to indicate the origin of the pain.