Presentation
Chronic wrist pain with swelling.
Patient Data
Abnormal intrasubstance increased signal and surrounding edema is seen along the course of extensor pollicis longus (EPL) tendon when crossing the second extensor compartment including the extensor carpi radialis longus (ECRL) and extensor carpi radialis brevis (ECRB) tendons associated with ECRL and ECRB tenosynovitis.
Intraosseous degenerative cyst along with the scaphoid bone proximal pole.
Case Discussion
The ECRB, ECRL, and EPL tendons intersect distal to Lister’s tubercle and radiocarpal joint. The tubercle acts as a pulley, changing the EPL tendon angle when it crosses superficially over the ECRL and ECRB tendons. This creates a mechanically disadvantageous arrangement, where the motion of the thumb and hand may cause friction between these tendons.
Unable to process the form. Check for errors and try again.