MRI appearance of degenerative injuries to the TFCC

What is the MRI appearance of degenerative injuries to the TFCC?

Either thinning or a full-thickness defect of the TFCC may be seen. There is also thinning of the articular cartilage on both the distal ulna as well as the apposed surface of the lunate, both of which may be hard to visualize. High signal intensity on T2-weighted images representing either bony edema or cyst formation may be visible in the portion of the lunate that abuts the TFCC. The ulna is generally longer than the radius (positive ulnar variance) in this situation, but this is not always the case.


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