[Horner's syndrome after fracture of the first rib].

Horner's syndrome after trauma is rare. After visual diagnosis, a search for the cause is urgent due to possible life threatening damage. Intracerebral bleeding and carotid dissection must be excluded. Traumatic Horner's syndrome often seems to be, as in the case described here, caused by a fracture of the first rib. As persistent symptoms are not described, conservative therapy is recommended.