MRI
Coronal T2 fat sat
Axial T2 fat sat
Evidence of tendon enlargement , intratendinous high signal and peritendinous free fluid at first dorsal compartment of the wrist are noted, involving the abductor pollicis longus (APL) and extensor pollicis brevis (EPB). The extensor retinaculum overlying these tendons appears intact with no obvious reactive marrow edema.