Volar Dislocation of the Lunate with 270° Rotation
Wrist Trauma • Xray
The lunate is the most frequently dislocated carpal bone. The most common type of dislocation is volar, rotated 90 degrees. In this case the lunate has flipped over and rotated an additional 180 degrees, for a total rotation of 270 degrees. This is a rare form of lunate dislocation, comprising less than 5% of cases. Dislocation of 270 dgrees should be treated as a surgical emergency due to the risk of acute carpal tunnel syndrome, which manifests as decreased sensation in the median nerve distribution and excruciating pain. Operative stabilization is required to maintain the reduction.
(This post was originally published on The Global Radiology CME Blog http://www.globalradcme.com/#!global-radiology-cme-blog/czj6 )