Avulsion fracture of the Ulnar Collateral Ligament (UCL) of the thumb
Following on from Case 4 this video demonstrates an example of an avulsion injury of the UCL of the thumb.
The UCL appears significantly thickened and an avulsion fracture maybe seen to the left of the image at the base of the proximal phalanx. The ligament on stressing appears patent and the avulsion fragment stable. The patient was treated with immobilisation for 4 weeks followed by rehabilitation. Click on link below
By contrast the normal appearance of the UCL is seen below