Reason: Cmc joint injury History: Pain and swelling thumb CMC joint There is focal edema within the base of the first metacarpal dorsomedially. There is slight depression of the overlying articular surface, which may represent a small impaction fracture. There is perhaps mild thickening of the capsular structure of the joint which may reflect mild sprain injury, particularly the intermetacarpal ligament. No additional bone marrow abnormality is noted. There is small amount of fluid in the first CMC joint. We see no findings of TFCC, lunotriquetral, or scapholunate ligament disruption. There is small collection of fluid intensity volar to the distal radius along the proximal margin of the radiolunotriquetral ligament that may represent a small ganglion or synovial cyst. Median and ulnar nerves appear normal. Extensor and flexor tendons are within normal limits without evidence of tenosynovitis.
Small focus of edema at the base of the first metacarpal with slight focal depression of the overlying the articular surface, which may represent a small impaction fracture. Other findings as above.