24 year old male with crushing injury of the hand. Rule out 1st dorsal interosseous injury or 2nd intermetacarpal ligament injury. Presents with pain in the 2nd MPJ. LIGAMENTS: No significant abnormality noted.TENDONS: The flexor and extensor tendons appear intact. BONES: There is increased signal abnormality within the second metacarpal which is most pronounced in the diaphysis and may represent stress reaction/fracture. No discrete fracture line is identified. Otherwise no bone marrow signal abnormality is identified.ADDITIONAL
1. Increased signal abnormality within the second metacarpal indicating stress reaction/fracture.2. There is increased signal/edema within the 2nd lumbrical muscle at the level of the third MCP joint which is nonspecific and may be post traumatic in etiology, although subacute denervation could also be considered in the correct clinical setting. 