Finkelstein's test primarily evaluates which tendons?

Finkelstein's test is specifically designed to evaluate the presence of de Quervain's tenosynovitis, which is an inflammatory condition affecting the tendons of the wrist. The primary tendons involved in this condition are the abductor pollicis longus and the extensor pollicis brevis.

During Finkelstein's test, the patient is asked to make a fist with the thumb inside the fingers, and then the wrist is ulnarly deviated. This maneuver places stress on the abductor pollicis longus and extensor pollicis brevis tendons as they pass through the first dorsal compartment of the wrist. If this movement results in pain along the radial side of the wrist, it is indicative of de Quervain's tenosynovitis, confirming that the tendons in question are indeed the abductor pollicis longus and extensor pollicis brevis. Therefore, this specific association substantiates the correctness of the answer provided.