Review Question - QID 7296

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Intersection Syndrome QID: 7296 (SAE10SM.8)

QID 7296 (Type "7296" in App Search)

A 23-year-old national team rower reports pain over the radial dorsum of the forearm that is made worse with flexion and extension of the wrist during competition. His primary physician initially diagnosed de Quervain's tenosynovitis, and a subsequent corticosteroid injection into the first dorsal compartment at the wrist provided no relief. The patient continues to report pain and audible crepitus that is noted 5 cm proximal to the wrist joint, on the radial aspect. What structures are involved in the continued pathology?

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Abductor pollicis brevis and extensor pollicis brevis

10/424

Abductor pollicis brevis and extensor pollicis longus

13%

55/424

Abductor pollicis longus and extensor pollicis brevis

64%

272/424

Abductor pollicis longus and extensor pollicis longus

18%

77/424

Adductor pollicis and extensor pollicis longus

5/424

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Intersection syndrome is also known as "squeakers wrist," "oarsmen wrist," and crossover tendinitis. It occurs where the first and second dorsal wrist compartment structures pass over one another, resulting in fibrosis, muscular changes, and inflammation of the bursa in this area. The structures involved are the abductor pollicis longus and extensor pollicis brevis (first dorsal compartment) that pass across the second compartment structures (extensor carpi radialis brevis and extensor carpi radialis longus). An audible "squeak" is occasionally heard at the intersection point, which is approximately 4 to 5 cm proximal to the proximal dorsal wrist crease.

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