[Thoracic pain].

This 32-year-old male patient came to our emergency ward because he was suffering of a painful string on his lateral thorax wall. There was no causative event in his history. Because of the clinical findings and the lacking inflammatory signs the diagnosis of Mondor's disease could be established. This selflimited disease is now generally accepted to be a thrombophlebitis of the lateral thorax veins. The disease can spread to the arm veins or the epigastric veins. The therapy is symptomatic in local application of antiphlogistic drugs.