<prompt> De Quervains disease is tenosynovitis ofAbductor pollicis brevis and extensor pollicis longusAbductor pollicis longus and extensor carpi radialis brevisAbductor pollicis longus and extensor pollicis brevisAbductor pollicis brevis and extensor carpi radialis longus  <response>: -Exterior pollicis brevis abductor pollicis longus tendons. - form the anterolateral border of anatomical Snuff box. -It occurs do repeated overuse of thumb wrist paicularly like thumb abduction. -Finkelstien test : Sudden ulnar detion is painful. -Anatomical snuff box Triangular depression on lateral side of wrist seen best when thumb is extended. Boundaries :- -Anterolateral - Abductor policies longus tendon Exterior pollicis brevis tendon -Posteromedial - Exterior pollicis longus tendon -Floor - Scaphoid trapezium Contents - Radial aery, radial nerve, cephalic vein 