De Quervain’s Tenosynovitis

De Quervain’s Tenosynovitis (also referred to as radial styloid tenosynovitis) is a painful condition affecting the tendons on the thumb side of the wrist. The condition is defined as inflammation of the synovium of the abductor pollicis longus and extensor pollicis brevis tendons as they pass at the level of the radial styloid of the wrist.