<prompt> De Quervains disease classically affects the -Flexor pollicis longus and brevisExtensor carpi radialis and extensor pollicis longusAbductor pollicis longus and brevisExtensor pollicis brevis and abductor pollicis longus  <response>: de Quervain;s tenosynovitis results from inflammation of common sheath of abductor pollicis longus and extensor pollicis brevis tendons. Finkelstein;s test can be done in this case Reference - Essential ohopaedics-Maheshwari-5th edn-pg no 303 