This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Injuries Around the Fore Arm & Wrist, Subject name: Orthopaedics
Finkelstein's test is positive in: 
Select and explain. 
A. Perilunate dislocation, B. Scaphoid fracture, C. Dislocation of shoulder, D. Dequervain's tenosynovitis
D: Dequervain's tenosynovitis
Answer: D: Dequervain's tenosynovitis 
Explanation: Ans. D. Dequervain's tenosynovitisDequervain's disease which is stenosing tenosynovitis of the first extensor compartment of the forearm at the level of the wrist. The physician grasps the patient's thumb and fingers holding the forearm with the other hand then quickly deviates the wrist to the ulnar side, this causes severe pain over the styloid process of the Radius. This is Finkelstein's test.