[Mediastinal fibrosis].

Even tough the ultimate etiologic and pathogenic mechanisms of mediastinal fibrosis are not quite established, several causes have been mentioned as the more frequent inducers, such as histoplasmosis, tuberculosis and other granulomatous diseases. Generally the diagnosis is suggested by a hilar or mediastinal mass, which is seen in thorax radiography, because 40% of patients are asymptomatic. Exeresis of fibrotic Magma is difficult because usually there is no separation with trachea neither with superior cava vein. That is why many times we have to restricted ourselves to the surgical approach on the complications. The present work discusses three new cases of mediastinal fibrosis.