Which condition is associated with pain during passive thumb flexion and ulnar deviation?

• A. Osteoarthritis of the thumb
• B. DeQuervain's tenosynovitis
• C. Carpal tunnel syndrome
• D. Radial tunnel syndrome

Answer: (B)

The condition associated with pain during passive thumb flexion and ulnar deviation is DeQuervain's tenosynovitis. This condition involves the inflammation of the tendons and synovial sheath that surrounds the abductor pollicis longus and extensor pollicis brevis. During passive thumb flexion and ulnar deviation, the inflammation and irritation of these tendons can elicit sharp pain, as they become compressed within the first dorsal compartment of the wrist.

DeQuervain's tenosynovitis is commonly seen in individuals who perform repetitive thumb and wrist motions, leading to swelling and pain that is exacerbated by certain movements, particularly those involving flexion of the thumb and ulnar deviation of the wrist. The relationship between the movements and the resulting pain is a key characteristic of this condition, making it a definitive clinical indicator.

Other conditions listed do have their own characteristic presentations and pain patterns, but they do not specifically align with the symptoms described. Understanding the specific tendon involvement and the associated movements is crucial in recognizing and diagnosing DeQuervain's tenosynovitis effectively.