Definition
Tenosynovitis at intersection of 1st and 2nd extensor compartment
Anatomy
1st extensor compartment - APL / EPB
2nd extensor compartment - ECRL / ECRB
1st compartment crosses over 2nd compartment 4cm proximal to Lister's tubercle
Epidemiology
Rare
Sports - tennis, rowing
Clinical
Tenderness over dorsal radius 4 cm proximal to Lister's tubercle
MRI
Edema at the intersection point
Management
Splint
Cortisone injections
Surgery
Release the 2nd dorsal compartment