De Quervain's disease classically affects the -
Flexor pollicis longus and brevis
Extensor carpi radialis and extensor pollicis longus
Abductor pollicis longus and brevis
Extensor pollicis brevis and abductor pollicis longus
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
Bony dysplasia and soft tissue affection