Lister's tubercle variant
Non-traumatic onset of pain, radial aspect of wrist. Pain has lasted for a few days. Referred with clinical diagnosis of De Quervain tenosynovitis.
USG finding of De Quervain tenosynovitis not uploaded here.
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This is a short-axis image of distal end of the radius on the dorsal side. There is a groove-like Lister's tubercle containing 3rd compartment tendon (extensor pollicis longus).
Lister's tubercle is the most important bony landmark at the distal end of the radius when examining extensor tendons at the wrist.
When it has a true tubercle-like shape, it separates the 2nd and 3rd extensor compartments.
The image shows a variation in Lister's tubercle. It is groove-like and lodges 3rd compartment tendon (extensor pollicis longus).