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