Right thumb pain LIGAMENTS: No significant abnormality noted. Specifically, the ulnar and radial collateral ligaments of the thumb appear intact.TENDONS: No significant abnormality noted. BONES: There is a cortical defect of the dorsal aspect of the base of the proximal phalanx of the thumb likely reflecting a subacute or chronic avulsion fracture. There is no significant surrounding marrow edema to suggest this is acute in nature. There is a slight volar tilt of the proximal phalanx in relation to the metacarpal but otherwise alignment of the thumb is relatively anatomic.ADDITIONAL
Avulsion fracture at the base of the proximal phalanx of the thumb. Given the lack of surrounding marrow edema, this is most likely subacute or chronic in nature. There is no evidence of collateral ligament tear and aside from mild volar tilt of the proximal phalanx, the thumb is otherwise in anatomic alignment.