Lunate dislocation

Case contributed by RMH Core Conditions

Presentation

High speed motor vehicle collision.

Patient Data

Age: 76
Gender: Male
X-ray

Volar lunate dislocation, with no scaphoid fracture seen.

Ulnar negative variance and severe 1st CMC degenerative change noted.

CT

Volar lunate dislocation, without evidence of scaphoid fracture.

This indicates disruption of the scapholunate, lunotriquetral and dorsal radiocarpal ligaments.

The dislocated lunate invaginates the carpal tunnel and displaces the flexor tendons and neurovascular structures volarly.Tiny (2-2.5 mm) bony fragment lies immediately dorsal to the proximal pole of the capitate. Significant soft tissue swelling is noted throughout the carpus.

There is negative ulnar variance. Severe degenerative change noted at the 1st CMC joint.

Case Discussion

Lunate dislocation needs to be differentiated from perilunate dislocations. Both of these injuries are often overlooked and require prompt treatment. 

PlayAdd to Share

Case information

rID: 33618
Case created: 19th Jan 2015
Last edited: 22nd Jun 2016
Inclusion in quiz mode: Included

Updating… Please wait.
Loadinganimation

Alert accept

Error Unable to process the form. Check for errors and try again.

Alert accept Thank you for updating your details.