16-year-old male with deformity and pain. Evaluate for radial collateral ligament disruption and possible volar plate injury. LIGAMENTS: Note is made of a small avulsion fracture along the radial aspect of the head of the first metacarpal at the insertion of the radial collateral ligament. There is minimal bone marrow signal abnormality in the surrounding area suggesting that this may be chronic in etiology. The radial collateral ligament itself appears intact. The ulnar collateral ligament appears intact.TRIANGULAR FIBROCARTILAGE COMPLEX: Within the limitations of a non arthrogram study, the triangular fibrocartilage complex appears intact. Note is made of lobulated fluid signal abnormality along the volar aspect of the articular disc of the triangular fibrocartilage which may represent ganglion formation, however, no discrete tear is identified within the triangular fibrocartilage complex.TENDONS: The flexor and extensor tendons appear intact. BONES: Note is made of a small avulsion fracture along the radial aspect of the head of the first metacarpal at the insertion of the radial collateral ligament. There is minimal bone marrow signal abnormality in the surrounding area suggesting that this may be chronic in etiology. The alignment is anatomic. There is a subchondral cyst within the lunate. Note is made of negative ulnar variance.ADDITIONAL
Avulsion fracture of the first metacarpal head at the insertion of the radial collateral ligament as described above, which may be chronic in etiology. Other findings as described above.