Pancoast syndrome: an unusual complication of pulmonary infection by Staphylococcus aureus.

Pancoast syndrome, which comprises a lower brachial plexus lesion and Horner's syndrome, usually results from local invasion beyond the confines of the lung by an apical lung carcinoma. Other causes are rare. We report the unusual occurrence of a case of Pancoast syndrome caused by a destructive sclerosing fibrosis after pulmonary Staphylococcus aureus infection.