intersection syndrome
Inflammatory condition where the first dorsal compartment tendons cross over the second compartment tendons in the forearm, causing pain and crepitus.
Full Definition
Intersection syndrome is an inflammatory condition affecting the area where the tendons of the first dorsal compartment (abductor pollicis longus and extensor pollicis brevis) cross over the tendons of the second dorsal compartment (extensor carpi radialis longus and brevis) in the distal forearm. This condition is particularly common in rowers, canoeists, and racquet sport athletes who engage in repetitive wrist extension and radial deviation. The inflammation occurs at the intersection point, typically 4-6 cm proximal to the wrist crease. Clinical presentation includes pain, swelling, and audible crepitus over the dorsal-radial aspect of the distal forearm. The condition is often confused with de Quervain's tenosynovitis but occurs more proximally. Diagnosis is primarily clinical, with tenderness and crepitus at the intersection point being pathognomonic. Conservative treatment with activity modification and anti-inflammatory measures is usually effective.
Usage
Usage note: Distinguish from de Quervain's by more proximal location and characteristic crepitus.
In Context
- "The rower developed intersection syndrome with characteristic crepitus 5 cm proximal to the wrist." — Sports medicine evaluation
- "Physical examination revealed intersection syndrome rather than de Quervain's tenosynovitis based on the anatomical location." — Clinical diagnosis