Tendon intersection syndrome at forearm.

A) Anatomy of compartment of the wrist:

The axial fat suppressed fast spin-echo T2-weighted image demonstrates peritendinous edema (arrow) around the abductor pollicis longus tendon (APL) and the myotendinous junction of the extensor pollicis brevis (EPB) of the first dorsal extensor compartment and around the extensor carpi radialis longus (ECRL) and extensor carpi radialis brevis (ECRB) tendons of the second dorsal extensor compartment at their point of intersection over the lateral radius.

A coronal inversion recovery-weighted image shows perimuscular and peritendinous edema around the extensor pollicis brevis (EPB) and extensor carpi radialis longus (ECRL).


The main abnormality is noninfectious peritendinous inflammation in the first and second dorsal extensor tendon compartments around their site of intersection, located 4 to 8 cm proximal to Lister’s tubercle. The etiology was originally thought to be due to mechanical friction between the two tendon compartments




Reference