Which tendons are primarily involved in De Quervain's Tenosynovitis?

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De Quervain's Tenosynovitis specifically involves the inflammation of the tendons in the first dorsal compartment of the wrist. The primary tendons affected in this condition are the extensor pollicis brevis and the abductor pollicis longus. These tendons are responsible for thumb extension and abduction, respectively. The condition often presents with pain on the radial side of the wrist and can be exacerbated by activities that involve gripping or pinching.

This inflammation results from repetitive thumb and wrist motions or trauma, which leads to thickening of the sheath surrounding these tendons. It's important to distinguish this condition from other types of tendinitis or tenosynovitis, where other tendons might be involved, such as in the choices referring to the flexor tendons or other extensor tendons. By focusing on the specific mechanical functions and locations of the affected tendons, a clearer understanding of De Quervain's Tenosynovitis can be established.

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