[Pancoast's syndrome (superior pulmonary sulcus tumor): review of the literature].

Pancoast's syndrome is produced by an apical lung tumor, with a local extensión to inferior brachial plexus, paravertebral sympathetic chain, vertebral bodies and first, second and third ribs. Its major cause is the non-small cell lung cancer, and this syndrome may produce shoulder pain and Horner's syndrome. The best diagnostic method is transthoracic needle aspiration, because of its peripheral location. Neoadjuvant chemoradiotherapy followed by complete surgical excision is the preferred approach to these tumors.