Diagnosis is primarily clinical, based on patient history and physical examination. The Finkelstein test is a common diagnostic maneuver where the patient makes a fist with the thumb tucked inside the fingers. The wrist is then gently bent towards the little finger. Pain on this maneuver is indicative of De Quervain's Tenosynovitis. Imaging studies such as ultrasound or MRI are rarely needed but can be used to rule out other conditions.
