De Quervain's disease is tenosynovitis of
-Exterior pollicis brevis & abductor pollicis longus tendons. - form the anterolateral border of anatomical Snuff box. -It occurs d/o 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