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.