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Accurately depicts De Quervain's disease (fibrosis of the synovial sheaths in the wrist) with surgical release. Labels: abductor pollicis longus muscle, extensor pollics brevis muscle, synovial tendon sheath and extensor retinaculum. Surgical steps: 1. Incision in the dorsal surface of the hand; 2. Blunt dissection down to the tendon sheath; 3. Abductor pollicis and extensor pollicis muscles are released from the fibrous retinaculum; and 4. Radial styloid prominence is removed.