<prompt> Dequervains tenosynovitis is a stenosing tenosynovitis of theTendo AchillesIliolumbar ligamentFirst extensor compartment of the wristMedian nerve  <response>: Dequervains tenosynovitis is a stenosing tenosynovitis of the first extensor compartment at the wrist comprising the tendons of extensor pollicis brevis and Abductor pollicis longus. 