| FINDINGS: | |
| There are posttraumatic cysts along the volar midline and volar lateral aspects of the lunate which are likely posttraumatic. There is no acute marrow edema (series #12 images #5-7). Marrow signal is otherwise normal in the distal radius and ulna, throughout the carpals and throughout the proximal metacarpals. | |
| There is a partial tear of the volar component of the scapholunate ligament in the region of the posttraumatic lunate cyst with retraction and thickening towards the scaphoid (series #6 image #5, series #8 images #22-36). There is tearing of the membranous portion of the ligament. The dorsal component is intact. | |
| The lunatotriquetral ligament is thickened and lax, but intact (series #8 image #32). | |
| There is no tearing of the radial or ulnar attachment of the triangular fibrocartilage (series #6 image #7). There is a mildly positive ulnar variance. Normal ulnar collateral ligament. | |
| The patient was positioned in dorsiflexion. Carpal alignment is normal and there are no tears of the dorsal or ventral intercarpal ligaments (series #14 image #9). | |
| There is a longitudinal split tear of the ECU tendon which is enlarged both at the level of and distal to the ulnar styloid with severe synovitis (series #4 images #8-16, series #3 images #9-16). | |
| There is thickening of the extensor tendon sheaths within the fourth dorsal compartment with intrinsically normal tendons (series #4 image #12). | |
| There is extensor carpi radialis longus and brevis synovitis in the second dorsal compartment (series #4 image #13). | |
| Normal flexor tendons within the carpal tunnel. There is mild thickening of the tendon sheaths and the median nerve demonstrates increased signal without compression or enlargement (series #3 image #7, series #4 image #7). | |
| There are no pathological cysts or soft tissue masses. | |
| IMPRESSION: | |
| Partial tear of the volar and membranous components of the scapholunate ligament with an associated posttraumatic cyst in the lunate. There is thickening and laxity of the lunatotriquetral ligament. | |
| Longitudinal split tear of the ECU tendon with tendinosis and severe synovitis. | |
| Synovitis of the second dorsal compartment and tendon sheath thickening in the fourth dorsal compartment. | |
| Tendon sheath thickening within the carpal tunnel with increased signal within the median nerve. |