Migrating foreign body in mediastinum--intravascular Steinman pin.

We report a case of migration of a Steinman pin to the innominate vein. A pin was used to fix a shoulder separation but a broken piece was left unattended at the time of removal of the pin. How this piece made its way in to innominate vein is puzzling. To our knowledge migration of fixation wires to the innominate vein has not been reported previously.