MRI of left wrist shows strain of the thenar muscles including the opponens pollicis, adductor pollicis brevis and first dorsal interosseous muscles. No intramuscular hematoma . There is subcutaneous edema along the radial aspect of the carpal rows, under the marker. There is mild effusion in the radiocarpal joint. Mild osteoarthritis at the first carpo-metacarpal joint with joint effusion, cartilage erosion, subchondral marrow changes and small osteophytes.