Ulnocarpal impaction may occur when the distal ulna extends beyond the distal radius (ulnar positive variance). When this difference in lengths occurs, the ulna may impact the TFCC. The TFCC is compressed against the ulnar aspect of the lunate bone in the carpus. This pinching phenomenon may lead to a tear of the TFCC. In addition, an MRI evaluation may demonstrate boney changes involving the ulnar aspect of the lunate.
When ulnocarpal impaction becomes symptomatic and is non-responsive to conservative treatment, your physician may discuss surgery involving shortening of the ulnar bone and treatment of the TFCC tear [insert hyperlink to TFCC injuries article]. This ulnar shortening osteotomy procedure reduces the length of the ulna and may help resolve symptoms that occur with impaction and pinching involving the TFCC and lunate bone.
The decision regarding nonoperative versus operative treatment is complex and should be discussed with your treating physician. Outcomes after surgical treatments vary and risks and benefits should be discussed in detail with your treating physician. Nonoperative treatment also carries risks and benefits which should be discussed with your treating physician.
Disclaimer: This information is not intended to covey, substitute or supplant any medical advice. In order to establish a treating relationship, please schedule and complete your visits with a licensed physician.
Copyright 12/15/2021 Tanay Amin, MD
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