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De Quervain tendinopathy

Patient with pain and tenderness of the 1st extensor tendon compartmen. De Quervain tendinopathy affects the abductor pollicis longus (APL) and extensor pollicis brevis (EPB) tendons in the first extensor compartment at the styloid process of the radius. Ultrasound shows a hypoechoic swelling of the tendons, peritendinous effusion und positive dopplersignal.